Medabots carry weapons that can damage the surrounding landscape, concrete and steel included. They're quite popular with the kids. Fortunately the live weapons have only appeared in video games. However this doesn't change the fact that the Medabots have self-healing capabilities and are VERY durable. If it weren't for the fact that their medals can be ejected with enough damage (or manually) these thing could take over the world. At one point in the past there was a incident where Medabots went rogue and nearly destroyed the world.
Beyblade: With some of the things Beyblades do to each other in the anime, they wouldn't be approved for kids in most real countries. The real ones are much less dangerous, but you should always make sure the parts are on tight. It doesn't help that there are military helicopters in Metal Fusion designed to specifically launch beyblades as weapons.
Beyblades specifically used as weapon is as old as the second arc of the first season of the original series, when it's revealed the whole Chinese team (and Rei, who hails from the same village) are trained to use them as weapons. This discovery comes right after a Bruce Lee Clone showed up with a nunchaku-mounted beyblade launcher. Then we get in Western Europe, where the top four bladers enter in official matches (and not official ones in the case of two of them) in full armour and include the launchers in functional weapons and by the final arc of season one it's almost expected that the Russian team tops that by having their beyblade launcher looking like firearms and, in one case, being used as such (thankfully it was a single-shot sniper rifle).
Bakugan should get a warning sticker of their own as of New Vestroia's second season. Good thing their real world equivalents cannot transform into their true forms.
Taken to the extreme with Danball Senki. LBX have a military application and have been used in assassinations before. However, due to the creation of the Fortified Cardboard, it has become the most popular children's toy the world has ever seen!
Digimon Tamers. Renamon found her way to the real world, in part, through Rika's love of the card game; Terriermon materialised from Jenrya's computer game; Guilmon was created from a piece of fan art drawn by Takato. If your kids' computer games and card games ended up spawning monsters, you should probably take the thing back to the shop.
Taken in a rather literal sense with Girls und Panzer, where Tank Combat in real WWII tanks is seen as an appropriate activity for little girls. The main character, Miho Nishizumi, is a sixteen-year-old 'veteran.
Its prequel manga Little Army has tanks being driven around by 10 year olds!
The Beano had a long-running strip featuring "General Jumbo", a schoolboy who had a fully functional remote-control set of toy soldiers and military vehicles created for him by a friendly neighbourhood Mad Scientist. He used them to fight crime. A number of British comic creators have gone on to create Expies, most notably Robin "Toybox" Slinger and her father "Colonel Lilliput" in Top 10 and "General Tubbs" in Jack Staff.
There was/is an European (most likely Franco-Belgian) comic called Charly that features a young boy and his Captain Lightning starship toy. It floats. It has lasers. It can blow a hole in a wall large enough to walk through (and kill an unfortunate sheep on the other side). The government finds out about it, things escalate and the toy demonstrates that it is quite capable of annihilating a squad of special forces. At some point there was a background story about a different boy with a tank toy.
Viz has done many parodies of General Jumbo and featured one-off strips about evil living toys and similar things. Regular strip "Tinribs" is based around a young boy's "robot" (actually glued together from random parts and unable to do anything mechanical) which is typically used to mutilate or kill the boy's teacher in every story. Another recurring strip using the trope was "Tommy Salter's Chemical Capers" about a boy who would perform horrifically dangerous, and usually fatal to others, experiments with his chemistry set.
This is the entire gimmick of DC Comics villain Toyman.
Played with in the Donald Duck comic "The Hypno-Gun." Although he considers it extremely irresponsible, Donald has no trouble believing that someone is marketing a Mind-Control Device as a children's toy. Unbeknownst to him, of course the toy doesn't really hypnotize people — the boys were just pretending (unfortunately, this doesn't protect their uncle from the power of suggestion...).
Mister Stuffins is a sophisticated robotic teddy bear, running a secret agent emulator program. The program was *not* included by the manufacturer.
In the film Jumanji, games of Jumanji could qualify, being a cursed artifact disguised as a game. Especially unfinished and abandoned games. Zathura, too. Well, theydowarn you.Jumanji warns you and then pulls you into the game if you even glance at the pieces.
Toy Story: Never outright addressed, but some of the toys seem a bit too dangerous for little kids to play with. The Buzz Lightyear figure alone is rather dangerous when you think about it. His wings have the capability to pop out with enough force to tear through duct tape like it was wet tissue, and the helmet flips back and forth rather swiftly too, it was enough to make Woody cry out in pain anyway. Also, while his laser certainly isn't a gun, the singular point it makes suggests it is an actual laser pointer, which can easily blind a child for life. In the sequel, Stinky Pete's pickaxe is apparently sharp enough to cut through fabric easy enough and function as a screwdriver.
Stinky Pete is justified, since he was a toy from the fifties, when BB guns and pocket knives were a part of many kids' arsenals.
The "laser" on an actual Buzz Lightyear toy is a red LED. This probably applies in-universe as well. A scrapped plot point for the third film involved Andy actually getting hurt by a malfunctioning Buzz. Though, this is somewhat beside the point, since a fully functional Buzz is still pretty dangerous on its own.
The Toy Story Toon "Small Fry" parodied the subject of recalled toys. One kids meal toy in the support group was recalled because one of its parts fly off it. The toy doesn't explain about it, but after the recalled toy says "I was recalled because...", the part mentioned earlier flies off of the toy.
The sci-fi movie Evolver features a robotic AI toy that just happens to have been installed with a state-of-the-art weapons-grade military AI chip; The robot is meant to be a harmless children's game, but it soon begins learning how to arm itself with more lethal weapons. The Evolver unit was originally a military battle robot prototype that was re-purposed after killing people in a field test. It got made into the grand prize for the top scorer of the Evolver VR Game so that they could play it in real life. The problem starts when its military programming that was left in gets reactivated by the protagonist's sister dramatically "dying" after it scores a "kill" on her and she gets back up. It realizes that its "weapons" aren't lethal, as they're "supposed" to be; to it, the Evolver game is a live fire War Game and refits itself to compensate.
Toys: This Robin Williams vehicle focused on the new owner of a toy factory switching production to toy tanks and helicopters armed with real weapons he meant to sell to the military. He also starts a videogame division to get kids into violence in order to have future soldiers. The videogame was actually a simulation/prototype. The new owner's plan was to have kids remote-control operate actual war machines without knowing it.
The Santa Clause: Tim Allen's character speaks out against his company's design for a Santa in a tank as a toy for the kids.
Scott Calvin: Well, isn't that a pretty picture, Santa rolling down the block in a PANZER! Well kids, I... I certainly hope you have been good this year, cause it looks like Santa just took out the Pearson home. Incoming!
The Nightmare Before Christmas has the main artist of Halloween Town taking over Christmas. The people of Halloween Town misinterpret Christmas rather badly, resulting in this trope.
A Very Harold & Kumar 3D Christmas has Wafflebot, a waffle-making robot with searing-hot maple syrup and a waffle iron that can be swung like a metal fist. Harold lampshades this.
There is a joke whose origin nobody can point out, but had been popular in the Eastern Bloc:
Dad: What have you done today at school?
Little Johnny: We made nitroglycerin in the chemistry class.
Dad: And which classes do you have tomorrow at school?
Little Johnny: What, there's no longer a school there!
In Robert A. Heinlein's Have Space Suit – Will Travel, Kip accidentally sets fire to the barn where he has his lab. His mother worries but his father merely comments that one should be careful about making explosives in a frame building. However, Kip is in his mid to late teens, old enough that entrusting him with flammable or corrosive substances wouldn't be considered out and out negligence even in this day and age.
The Alcatraz Series has teddy bears that double as hand grenades. They are explicitly designed to be used by kids for self defense.
In the Philip K. Dick short story "War Games", Earth has a safety board inspecting toys from Titan, with whom they are having a political Cold War, but whose goods are still popular. We see at least one dangerous toy—a VR costume-suit which causes the wearer to lose contact with reality. The safety board is afraid everything could be like this, so they have a paranoid eye on everything— excepting a board game that looks like a Monopoly variation, but isn't. (No, the board game doesn't count unless you consider undermining capitalism dangerous.)
The short story Bobo's Star has kids in the future being given their own miniature star-creation kits at home. The titular character's star turns into a black hole and devours the Earth because nobody would listen to him.
The Stephen King story "Battleground", part of the Night Shift collection, has a hitman who killed a toy designer attacked by an army of toy soldiers, complete with air support. They eventually kill him by breaking out a tiny nuclear weapon.
Something similar happens when Death substitutes for the local Santa equivalent in Hogfather. A little girl asks for a sword (as well as a few other gender-abnormal toys). He gives her one (Death does not have a very good grasp of parenting), although he's eventually convinced to take it back.
Thud!: Lampshaded where Sam Vimes suspects there are intruders in his house and is looking for a weapon. Sadly, he's in his son's bedroom, and he notes he and his wife completely overlooked the range of toys with sharp steel parts. He settles for the leg of a rocking horse.
Playing cards that explode, albeit without much force.
Marbles that squirt nasty-smelling liquid in your face when you lose a point.
Dudley owns a small, working tank that he once ran over the neighbor's dog with.
Chess pieces that beat each other to death probably deserve a mention.
Bludgers in the Quidditch games. They can give somebody a pretty nasty concussion if they hit you in the head, and knocking you off your broomstick at certain heights is also dangerous in and of itself.
Fanged Frisbees, living frisbees that have teeth on their edges.
How about the actual broomsticks? They can travel over 100 mph, they fly more than high enough to cause fatal falls, and kids ride them without any licenses, seat belts, safety equipment, lights, or air traffic rules. Even in blinding rain and thunderstorms. Neville, Harry, and a few other characters actually sustain broken bones and concussions from falling off brooms, but nobody in the wizard world seems to think broomsticks are dangerous.
Well, this is a world where broken bones can be fixed with a flick of a wand, provided the person actually knows the spell. Even missing bones can be regrown with a magic potion. And first-years (generally) aren't allowed to have their own brooms; in fact, that's generally when they have lessons for using them over the course of the year.note Harry was given special dispensation because of his natural flying skills, to the point that he was actually named Seeker of the Quidditch team—a position specifically requiring excellent flying skills with a broomstick. There are toy brooms that only hover a few feet off the ground.
Love Potions. As illustrated in Half-Blood Prince, they are incredibly potent and ripe for abuse, being not much more than magical date rape drugs. They are apparently unregulated other than not being allowed on school grounds, and are openly marketed and sold to children in a joke shop. This one has not gone unnoticed by the author or the characters; Harry at one point compares love potions to Dark magic.
How To Be A Superhero warns the would-be superhero about putting his name to merchandise without checking its safety, citing such previous PR disasters as Captain Feline and Blackie the Wonder-Cat's "Kitty-Fun" playsets (a variety of ways for a child to torture a cat) and the Mr Inferno dressing-up kit (one costume, one bottle of kerosene, one box of matches)
Georgia Nicolson worries about her little sister's "Pantalitzer" doll, described as having a terrifying face, steel forks for hands, and easily detachable parts that hurt when thrown at Georgia.
In Cruel Zinc Melodies, a little dwarf girl begs Garrett to help her parents, who've been beaten up by something in a basement. Before venturing down, Garrett borrows her helmet, axe and sword, which are child-sized but fully functional; apparently it's normal for dwarves to encourage their kids to play with My Little Panzer.
Live Action TV
In the 70's, Saturday Night Live had toy maker Irwin Mainway (played Dan Aykroyd) appear on a consumer watchdog show called "Consumer Probe", and hopelessly defend his company's extremely dodgy and dangerous products, and drawing comparisons with the dangers of actual commonplace products. In one episode, he tried to defend a series of Halloween costumes, including "Johnny Space Commander Mask" (simply a plastic bag and a rubber band), "The Invisible Pedestrian" ("NOT FOR BLIND KIDS!"), "Johnny Combat" (which comes with an actual working rifle, ammo not included. Allegedly popular in Detroit), and "Johnny Human Torch" (oil-soaked rags and an oversized torch. "It lights up the night!")
Then you got "Bag O' Glass", along with its spin-offs Bag O' Nails, Bag O' Bugs, Bag O' Vipers, and last but not least, Bag O' Sulfuric Acid.
One of those pathetic attempts to defend his products involved a harmless toy phone; Mainway argued kids could choke themselves with the long stretchy cord. These days, what with the CPSC wiping out long cords of all sorts on kids' toys, the dangerous phone is a funny aneurysm (much like most things on SNL).
Lots of the SNL's fake toy commercials are for toys that would never be sold in real life (whether it's because they're physically dangerous, will cause complaints from Moral Guardians who think that kids are impressionable enough to be screwed up by what they play with, or are just plain useless and/or lame). Some examples include: Gangsta Bitch Barbie (comes with Jolly Ranchers, a pack of Newport cigarettes, and a restraining order against her boyfriend Tupac Ken), Nerf Crotch Bats, Big Red (A viking who sprays massive gushers of blood-red liquid), Litter Critters (using cat crap to make clay figurines), and the recent dangerous toy commercial, Li'l Poundcake (a doll that administers vaccinations against the HP virus for girls under 10).
Merrick And Rosso had a sketch involving two modified remote controlled toys from hell; One being a Thomas the Tank Engine with a buzzsaw on the front, the other being a Barbie-style van with a flamethrower, both tearing up mundane toys. (Except the official Merrick and Rosso inaction figures)
Spishak's products in general, actually. Besides the above, there's Yule Blazers (plutonium-powered Christmas lights), the Bris-O-Tine (a mini-guillotine designed for circumcision), the Snoorfpk (a spoon/fork/knife combo), etc.
A number of the Mad's contributions to the Invention Exchange on Mystery Science Theater 3000 fit this trope: a flame-throwing Godzilla figure and the Unhappy Meal are just two examples, and Joel and the 'Bots would call Dr. F out for his depravity.
In the Get Smart episode "Our Man in Toyland", Max and 99 take on defeat a bunch of KAOS agents in the toy department of a department store using only the (highly-destructive) normal toys on sale there, up to and including the knockout blow, Destro the toy nuclear missile.
Agent 99: Max... you were wonderful!
Maxwell Smart, Agent 86: No 99, the real credit belongs to these toys. After all, we had at our disposal every fiendish and destructive plaything ever devised for the pleasure of little children. Those poor devils, all they had were real guns and bullets.
In Loriot's classic sketch "Weihnachten bei Hoppenstedts" ("Christmas at the Hoppenstedt's"), Father Hoppenstedt buys for his offspring a model nuclear power plant. It makes "poof!" if you did a mistake while assembling it. It does go 'poof', blowing a hole through the floor and into the apartment beneath.
On CSI: New York, an exploding-cigar murder was traced back to a young man who'd targeted a back-of-the-comic-book toy dealer. As kids, he and his best friend had taken a comic book ad's boastful claim that a cardboard submarine could take you on "amazing undersea adventures" literally, and she drowned in a lake.
RoboCop: The Series has this in spades with the Commander Cash toys. Black Comedy aside, these toys can seriously kill and maim. For example there is a Commander Cash action figure (The Commander Cash Nighty-Night doll) that is actually a fully functional hand grenade, And it's pitched as a bedtime buddy!
Joked about in an episode of Mythbusters, in which the main duo were trying to determine whether a Hot Wheels car could defeat a real car in a short distance race down a hill, when both are running entirely on momentum. Both Adam and Jamie build their own custom toy cars for the purpose, with Adam's offering being effectively a block of lead with wheels. When Adam jokingly comes up with an advertisement for his creation, Jamie joins in, adding, "and if you throw it at your brother really hard, it could kill him!"
Musician Doctor Steel has this as his gimmick, too. That and megalomania.
In "Lament for a Toy Factory", he mentions "babies with buzzsaws, dollies with knives, gasoline-filled super soakers" as the too-drastic toy designs that got him fired... and were later used for revenge against the factory.
Insane Clown Posse's "Toy Box" (from their Riddle Box album) has a bullied schoolboy making these toys on purpose in order to kill his tormentors in revenge. He then brings them to class for "Show and Tell," which results practically the entire class getting strangled by Slinkies, decapitated by sword-wielding robot figurines, and - most horrifyingly of all - shot to death by cute rubber duckies that go "Squeeku....squeeku....BANG!" Faux Affably Evil to the max, especially with a Howdy Doody-like voice cheerily announcing: "Nothin' beats a good hardy-har-har, right, boys 'n' girls?!"
In Bloom County, Oliver Wendell Jones's father gives him a chemistry set as a gift. Said chemistry set is promptly used to genetically engineer what is supposed to be a long-tailed hamster, but ends up making a number of freakish mutants. You'd think Oliver's father would have learned his lesson from the Pentagon hacking, homemade nuke, and subliminal hypnosis incidents...
The now-defunct Mexican music station "Radioactivo 98.5", during The Nineties and early 2000s ran every holiday season spoof toy adds of "Juguetes Radioactivos: Ofensivos Inhumanos" (Radioactive Toys: Offensive and Inhumane), which included "Uzi el Oso" (Uzi the Bear: Under this adorable guise you'll find a destructive arsenal never found in a stuffed toy! Just twist it an arm and you'll discover why it's creators were locked in an insane asylum!), "La Bomba" (The Bomb, which becomes a "Funny Aneurysm" Moment in light of recent events), "Infectors" (a parody of Transformers: Collect all the different Infectors: Ghonorreal, Salmonellator, Typhoideak and others! Have fun infecting your friends!), "La Maquina de Raspados" (In Spanish "Raspado" means ice-cream and scrape/abrasion, making it in reality "The Scrape Machine": Feel its rigor with its six blades, turn the lever and you'll even scrap the bone!).
In Super Mario RPG, Gaz has a Geno doll. Even before it becomes possessed, it still manages to knock Mario out. Although, that might have been Gaz being overly enthusiastic.
One of the early missions in Grand Theft Auto: Vice City involves using a toy helicopter to carry timed explosives into an uncompleted building to blow it up. Security guards and construction workers come after it once they catch on to your charade, but you can kill them by running the chopper into them.
Subsequently in Grand Theft Auto: San Andreas, after you buy Zero's shop, all of the three missions you must do for Zero involve My Little Panzers. The first involves defending from a swarm of RC planes dropping bombs with a minigun, and the second has you using a prototype RC biplane armed with an infinite-ammo cannon to kill employees of Berkley RC, Zero's arch-rival in the business of RC toys. Serious business indeed.
Zero: They're not 'toys'! They're just smaller!
Oh, and the third? Seems like the actual use for these things: a car tries to drive a road into a base. Berkley's helicopter drops obstacles that your helicopter has to remove. Bentley also has actual tanks shooting at his car, albeit with low-powered ammo for their size. You have access to antitank bombs.
The Wario Land 4 Wario car action figure-like enemies. Oh the irony of a toy based on Wario driving his car being something that's dangerous enough to kill him in the toy themed levels. It also had a metal spike on the front (hence how it was so dangerous), could drive through more spikes, and was apparently a pretty good throwing weapon.
While not toys by any means, the Scoobies from Phantom Crash are often piloted by children. In fact, the shop owner who sells you upgrades gets called out by one of the top pilots for essentially selling weapons to children. The shop owner brushes it off and it's never brought up again.
The foot-tall Robos of Custom Robo are actually pretty harmless themselves, despite being able to shoot lasers, bombs, or swords. They can only work within specialized arenas called Holosseums. Except illegal parts can do rather horrible things to whoever uses them, and the local Cthulhu happens to have accidentally possessed one. These behaviors might be excusable, since they're not well known. The part where losing in a Holosseum knocks you head first into the ground and quite often knocks you unconscious might not pass the CSPA muster.
That last bit happens only when the "safety switch" is off, which allows the robos to use their abilities to the fullest extent. Regular, day-to-day Holosseum battles are massive nerfs of the robos so that no one is hurt. Illegal parts are actually capable of killing someone if the switch is off (though this is rare, even with the ridiculously powerful illegal parts)... this is why they're illegal.
The eponymous fireplace of Little Inferno is powerful enough to consume virtually anything in its fires, and the player is encouraged to throw in things like batteries and chainsaws.
Warthog's ending in Twisted Metal 4 which is a parody of General Jumbo, except the opposite way. He wished for a world with unending warfare, so he gets put in a sandbox with other little toy versions of the other competitors. And then they came out with Twisted Metal: Small Brawl.
In the pre-war backstory of Fallout: New Vegas, REPCONN sold rocket souvenirs filled with actual radioactive rocket fuel, which kids mistook for Nuka-Cola, and subesquently developed a sickness called the "REPCONN Shakes". They subsequently unloaded their stock at the Dino-Bite gift shop in Novac, where they sat for the next 200 years.
Euclid's C-Finder is a toy gun that is actually the target designator for the Archimedes II Kill Sat. Not quite a straight example because it wasn't designed as a toy, some kid just found it in the post-apocalyptic rubble and used it as one until the Player Character gets hold of it. Luckily for the kid, Archemdes II itself isn't activated unless you do something about it.
In Dawn Of The Dragons, several of the familiars the player can collect are toys created by the gnome inventor Bosso. Said toys are usually faithful reproductions of World Raid boss monsters, like the toy based on an acid-spitting dragon that also spits acid, the toy based on a dragon with retractable spines that also has retractable spines, and the toy based on a dragon that literally overflowed with power that is also Made of Explodium. According to the flavor text of various items, at least one child was nearly killed when she hugged the spiky dragon toy too hard (luckily there was a cleric with healing magic nearby). One jerk accidentally killed his mistress with the exploding dragon toy, and then used another one to kill his wife on purpose. Then he got run over by a carriage and went to hell for his sins. He had the gall to blame Bosso for it claiming that he wouldn't have been tempted to commit murder if Bosso's toys didn't make murder so easy. Bosso also made a dragon toy big enough to ride (which is a mount in-game) that is covered with spikes, claiming they are a safety feature. When the player character calls Bosso out on it, he claims that he meant that the spikes would make it safer for the person riding it, not the people in its way. Bosso is perfectly aware that his toys are dangerous. He just thinks that safety isn't as important as making his toys as accurate as possible.
Strong Bad Emails: It's implied that practically everything sold at Bubs' concession stand is highly unsafe and quite possibly illegal. The most overt example would be Hollerin' Jimmy's Hobby Kit, whose slogan is "We have no idea what's inside this box!"
The Stab Yourself! Try not to stab yourself!
Not everything Bubs sells is dangerous. The stuff he sells out back on the black market is quality goods. In fact, in his capacity as a black marketeer, he's so devoted to customer satisfaction (as opposed to his capacity as an official businessman, in which he relies on not having any competition) that if you specifically want something that will cause an allergic reaction, he'll sell you the allergenic stuff.
Though he sold Strong Bad a pinata that was filled with...
The Bravest Warriors episode "Dimension Garden" revealed that Chris and Beth owned a sword and shield and a flamethrower, respectively as children. That's to say nothing of Wallow's collection of toys including such wholesome ones as Princess Dysentery, Colonial Plague Caitlin, Chlamydia-Eyes Cat, and Menigicoccal Meningitis Paco.
Narbonic: In "A Week of December 18th Story", a parody of A Christmas Story, little (future Mad Scientist) Helen's Christmas toy of choice is the BioBeam 8000 gamma irradiator with 5-liter containment chamber, cesium 137 radiation source, optional remote monitoring station, and a thing on top that tells the time.
There are two major groups that create these in the SCP universe. Dr. Wondertainment creates toys that often just fly in the face of physics, and are safe when used properly. Of course, one of them has such features as a fire drill, a boom ray, an Atomic Grenade, and Robo Dance. The Factory, on the other hand, appears to make its various objects with malicious intent behind them, and are very dangerous even when used properly. Many other toy SCPs exist, some just weird, some threaten the world itself.
A teenager published in 2004 on Something Awful the story of how he made aflamethrower out of common household items including PVC pipe, complete with pictures of the weapon being tested. At night, for better visibility.
In The Simpsons, Homer buys Maggie an Army Base playset with actually working, explosive missiles. When Marge points out how dangerous it is, Homer claims it's perfectly safe, but is stabbed, maimed and shot by the toy.
Another example from The Simpsons was a cereal with jagged steel letter O's in it. It was supposed to be a prize, not eaten, but the regular cereal was not much better.
Reporter: What about that little boy who got appendicitis from eating your cereal?
Krusty: To prove that this metal O is harmless, I will personally eat one. (eats the O) See? There's nothing— (starts screaming and writhing) Oh, boy! This thing is shredding my insides!
Sideshow Mel: Er, Krusty, that wasn't the metal one, that was a regular Krusty O.
Krusty: It's poison!
At the end of the episode, Bart reveals to Lisa the new and improved Krusty cereal; "Flesh-eating bacteria in every box!"
Most of Krusty's toys were dangerous in some sense or other. This is because Krusty is such a corporate whore that he'll put his name and approval on anything that he's paid to, no matter how dangerous, and his die-hard fans will buy anything with his name on it, regardless of quality or safety.
On Squidbillies, Dan Halen Industries sold a baby crib that was so dangerous, critics called it a "Baby Deathtrap". The company sued for trademark infringement, as it sold actual Baby Deathtraps: teddy bears bristling with electric spikes.
An episode of Yin Yang Yo had a villain who manufactured these because he loved money and hated children. The most memorable and blatant were probably "Eyebiters", which were exactly what they say on the tin.
The South Park episode "Good Times with Weapons" has the boys trick a county fair vendor into selling them several dangerous ninja weapons. It ends in an Anvilicious note when their parents are more concerned with nudity (Cartman appeared naked under the delusion that he was invisible) than the fact they seriously damaged Butters' eye.
Other dangerous toys on South Park include: Chinpokomon (the toys themselves weren't dangerous, but they were pawns in a plot to brainwash kids into bombing Pearl Harbor), Wild Wacky Action Bike (the kid who tried to ride it in the commercial crashed into the underside of a truck), Alabama Man and Wife (teaches boys to be drunken, wife-beating trailer trash), and Stupid Spoiled Whore Video Playset (teaches girls to be like Paris Hilton), and a make-your-own Mr. Hankey play set, whose commercial was filmed in live action.
The Reptar wagon in the first Rugrats movie. Who would give their babies a toy that can spew real fire? In fact, everything Stu Pickles devised in Rugrats fits this trope.
There's a store full of these played for laughs in an episode called Toy Palace.
In Superman: The Animated Series, any toy created by Toyman fits the trope. Most notably, the Dopey Dough he throws on the unsuspecting Superman:
Toyman: "Uhhh, maybe you should read the warning?? Dopey Dough is a lethal biogenic organism. Contact with the skin can prove fatal. It won't stop growing until it asphyxiates its host. NOT for children under 30."
As a homage to superheroes, something similar shows up in Darkwing Duck, with Quackerjack's toys. 'Don't play with Quackerjack toys, they're dangerous!' was once said before the child in question threw the toy. She had to pull the pin first.
Ed, Edd n Eddy has some of Ed's toys, including an action figure of a small monster that acted as a flamethrower when a certain button was pressed. To the surprise of Edd when Ed was in a bad mood and they were using it in a puppet show.
Cow and Chicken had an episode where they accidentally create perpetual energy using a child's chemistry set. The Red Guy kidnaps them to recreate it.
Subverted in Big Guy and Rusty the Boy Robot, where the consumer models of Rusty are perfectly harmless. Unless, the Legion Ex Machina hijacks their AI to do robot conquest bidding. Then proceed to retrofit them with the same nuclear power source as the original Rusty. At that point it is like the equivalent (yield) of several thousand tactical nukes or one strategic nuke.
In Ben 10: Alien Force, a little alien loses her toy. The toy in question can shapeshift, regenerate, and mimic other people and aliens' special abilities. Not only that but it's actually more technologically advanced then the Omnitrix.
On Johnny Test, everything made by Wacko Toys is intentionally dangerous to children, because the CEO hates children, and his employees have no problem with it beyond greed. Examples include a board game that punches you if you land on a certain square, another board game where if you mess up you get electrified, a bag of tacks, a robot that traps kids within their own houses until they're 18, an exploding frisbee, a mechanical alligator, helium-based gum, exploding gum, and a prison disguised as a video game.
Who wouldn't want to play such wholesome games as "Left Hook", "Don't Shock Yourself", and "Bag O' Tacks"?
On Jimmy Two-Shoes, Since Misery Inc. seeks to torture everyone, it's no surprise that several of their products are aimed at kids.
In the Fanboy and Chum Chum episode "Total Recall", the titular duo have a toy octopus that spits corrosive ink, electrocutes them, has tentacles with the sucking force of a real octopus, and explodes randomly. Among Oz's collection of recalled toys, there's "baby's first nail gun", a fire truck that functions as a flamethrower, dolls that spit acid, a doll whose arms fly off at 100 mph, a sock full of nickels, and a model warship with real weaponry (which was recalled because it was a choking hazard).
In the Family Guy pilot, Peter is fired after unsafe toys are released when he falls asleep on the job. Such toys including a bottle of pills inside a "Pound Poochy", a hatchet being marketed as a silly-ball, and a "Baby Heimlich Doll" with a built-in flamethrower.
Robotomy has Tickle Me Psycho, a My Pet Monster-meets-Tickle Me Elmo-style doll with the screechy, nasal voice of Gilbert Gottfried who acts like a complete Jerkass to robot kids (in the commercial, he stole a kid's drink, drank it, and tossed the cup in the child's face, ripped another kid's fingers off and ate them, and tore a third kid's "I Love You" card and kicked him. It ends with Tickle Me Psycho yelling, "I can't stand kids!") and is plotting a war against them.
One episode of My Life as a Teenage Robot has the Cluster deceiving Jenny into letting her image be used in the creation of action figures that would later attempt to destroy her. They were turned off at the end by a power switch; this leads to a serious CMOF as Brad refuses to believe Krackus would be stupid enough to control them through a power switch, leading Tuck to prove how stupid he actually is in order to break Brad's Willing Suspension of Disbelief. Vexus scolds him for his design plan after they're defeated.
An inversion of sorts from the same show is Killgore, a little wind-up toy robot with delusions of being a master criminal. Despite almost getting the better of Jenny a couple of times, no one takes him seriously, as he's too darn adorable.
An episode of Robotboy had a store clerk copying Robotboy's image to create "Roboboys" (note the omission of the 'T') that predictably went berserk. To differentiate them from Robotboy the horns, lower legs, and hands came in a multitude of colors.
Averted in just the setting you might expect to find this in, what with all the talk/creation of dangerous summer activities in Phineas and Ferb. The toys we've been shown seem to go the opposite direction, including such gems as Shimmy Jimmy, Little Mary MacGuffin, Perry the Platypus: Inaction Figure and Bricknote It's fun.
In Kim Possible: So the Drama, Dr. Drakken's plan is to buy Bueno Nacho, give away little toy robots to customers, then activate them to become an unstoppable army of adorable killer robots.
On Sidekick a supervillain's evil plan was to sell thousands of Eric action figures in Splitsboro, which later turn out to be an army of killer robots.
In the VeggieTales Christmas episode The Toy That Saved Christmas, the eponymous toy is a "Buzz-Saw Louie" that has gained a conscience and seeks to stop the over-commercialization of Christmas that resulted in his design and manufacture in the first place. Buzz-Saw Louie dolls have functional buzz-saws in their right arms.
An episode of The Batman entitled "Cash For Toys" revolved around a toymaker who made incredibly dangerous toys, chief among them a flying platform that took one poor kid flying for miles and left him stranded atop some power lines.
Very minor example in Doc McStuffins: the sword of an action figure in the show is shown to be sharp enough to rip through a plush toy when said plush is swung into the sword in error in the same episode. Given that plush fabric is usually pretty strong material, the sword couldn't have been made of plastic.
Mild by comparison with some examples, but there was one episode of Fireman Sam that ended with Norman Price doing something with a children's chemistry set that required the assistance of the fire brigade.
The most infamous: Lawn Darts. Which are large, heavy, metal tipped darts that kids are given to throw at targets placed on their lawn. Needless to say, throwing spearlike "toys" is not a good idea. Considering lawn darts are the modern equivalent of the plumbatae of the Late Roman Empire...
It gets worse - the original game required each player to place their target at their own feet from where you would throw your darts at your opponents targets placed at their feet. Even six year olds knew this was a bad idea.
The Atomic Energy Lab pictured above was a real toy. In 1951, A.C. Gilbert introduced his U-238 Atomic Energy Lab, a radioactive learning set we can only assume was fun for the whole math club. For a mere $49.50 (adjusted for inflation: $404.40 in 2009), the kit came complete with three "very low-level" radioactive sources, a Geiger-Mueller radiation counter, a Wilson cloud chamber (to see paths of alpha particles), a spinthariscope (to see "live" radioactive disintegration), four samples of uranium-bearing ores, and an electroscope to measure radioactivity.
These guys can hook you up, but it's not in one convenient set. And will run you a bit more than half a c-note.
"Very low level" radioactive sources are harmless and do exist in the environment (soil, rocks, concrete, water in rivers in many parts of the world may contain trace amounts of radioactive minerals enough to register on a Geiger counter). Making the idea of atomic energy popular has political Unfortunate Implications.
You can get the equivalent today at any science or educational supplier. Radioactive samples are not controlled nor particularly dangerous compared to normal household chemicals and a geiger counter is a great intermediate electronics kit. Highly recommended if you have any interest in science or electronics.
Home chemistry sets used to be quite popular for young science nerds. However, fears of poisoning, acid burns, and explosions soon brought the combination of lawsuits and Moral Guardians to stop sales. "Chemistry" sets can still be purchased, however they contain practically nothing of any use. Buying a box of baking soda is the same thing.
Some prominent scientists have bemoaned the fact that kids can no longer experiment with chemicals, explosives, and rockets, as a number of famous and Nobel Prize winning scientists began their interest in science by experimenting with them. Attempting to do so today is quite likely to lead to the child being arrested as a "terrorist".
And, as stated, experimenting with anything else will bring the SWAT team to your house to bust up your meth lab.
You can still buy those kits in Mexico and other Latin American countries, since those countries have lax regulations about what kind of toys can be sold (with the exception of weapon-shaped toys and other dangerous toys.)
These sets are also available in Russia, but they are no match for the fabled Soviet "Kid Chemist" set that included, among other things, strips of magnesium for kids to burn and (not dangerous, but awesome!) a real retort.
There's still a lot of potential for fun experiments, even in the U.S. — in the current economic climate, parents should note that an arc welder costs about half as much as a Nintendo DS.
BB Guns, by definition. In the wrong neighborhood, any sufficiently real-looking gun is dangerous.
For this reason there are actual laws in the U.S. and U.K. that demand that toy guns be made in bright, unrealistic colors. You can not buy realistic looking toy guns. Although it is rather annoying for the children, it does make parents feel a lot safer knowing it is less likely their child will be shot by police by mistake.
This adds Fridge HorrorAdult Fear. Think about what would happen if you owned a gun and your child found it (even without bullets) and decided to play "Cowboys" with it. Now imagine what would happen if a police officer was driving by as your child was playing.
Think about what would happen if we didn't have to live in fear of armed patrolmen who are allowed to literally murder children simply for APPEARING to do something that is a basic right guaranteed in the single most significant founding document of our country.
It doesn't just happen a little, about 2000 children a year accidentally shoot themselves with a gun in the U.S. alone, 7000 if you include intentional shootings. 
An arcade shooting game had its gun replaced with a bright colored model because of this. Apparently when police entered arcades they were not amused to have realistic looking toy guns pointed at them.
The Nintendo Entertainment System 's Zapper peripheral had to be redesigned twice for this reason. The original Famicom zapper resembled a real gun, but the NES equivalent was changed to be more abstract-looking (but grey), and later on recolored bright orange.
Similarly, the original version of the Transformers character Megatron transformed from a robot into a Walther P-38 pistol. More recent incarnations have transformed from a robot into a dinosaur, a jet, or a tank (for example) so that his action figures don't (legally) need to be bright orange.
In addition, the Japanese version fired foam pellets. Most other Transformers localizations also had their missile launchers dummied out or nerfed.
The redesign of the original toy in 2006 turns into a differently-colored one-off of a Nerf Maverick blaster with orange safety cap, rather than the semi-realistic Walther P38. Despite this being legally mandated, toy collectors stillcomplained.
The Walther P-38 version of Megatron was yet again redesigned as "Masterpiece" Megatron, now with a far more detailed and intricate transformation scheme. He still turned into a Walther P-38, but now one nearly twice the size of the actual weapon. It was not allowed to enter the US without a neon orange safety plug in the barrel, even though it ships in robot mode.
The newest Walther P-38 Megatron toy, a Legends-class (read: really small) figure released in the 2011 "Reveal the Shield" line, still has an orange tip on its barrel, despite measuring about 3 inches from front to back.
The policy of having fake guns painted artificial colours has now resulted in a large amount of black spray paint being used to cover up these features and police concerns about real guns with unusual colours or a spray-painted tip.
Well since obviously, toy guns are no actual threat or danger to police, but police guns are obviously a huge actual threat and danger to children, maybe the POLICE should be the ones who have to paint their guns orange.
The Cabbage Patch Kids Snacktime Kid. Note to manufacturers: when building a toy that chews anything put between its teeth, including fingers and hair, install an OFF switch!
There was one — remove the backpack and the doll shuts off — but this was only documented in the instruction book, and who reads the instructions on a doll?
Bindeez (the precursor of Aqua Dots) were recalled due to the factory substituting a cheaper chemical that becomes GHB (a date rape drug) in the stomach if you swallowed them. Since they are so small, swallowing them is not a problem. They were re-released as Beados "Featuring the new bead formula."
The Golden Book of Chemistry Experiments, which was in one well-known case to inspire a boy scout to build a model nuclear device, although the device did not achieve fission but only transmutation, it did contaminate the neighborhood with a substantial amount of radiation and provoke the attention of the authorities.
Similar to the Beyblade example at the top, Pogs could be painful but not especially harmful if one of the striker discs ricocheted... until some enterprising manufacturers decided to make small metal throwing stars to fit the role. How they got away with those boggles the mind.
Likely because its edges were blunted. Yes, it's fine because, while it may have points, the heavy chunk of metal's edges are blunt.
Which doesn't change the fact that it's a heavy chunk of metal with points that you can presumably still throw like a ninja star. (Which is the first thing that anybody did when they got one of those)
Entertech Water Pistols were one of the reasons that toy guns are molded in garish colors now to keep police from misinterpreting a child's toy, and keeping criminals from using them in holdups. The commercial even clearly stated:
Another Transformers example; there used to be a line of toys with the ability to "spark", they would produce light, sound, and exhaust similar to real engines and weapons. They work via an internal steel wheel rubbing a flint, much like a cigarette lighter. Skating Barbie dolls had similar roller blades to spark up the ground. Needless to say, Hasbro refuses to produce these anymore.
Most knock-off toys (the kind of things you find at car boot sales, market stalls etc. they're normally based on a popular kid's film or cartoon, for example Spider-Man or Cars) are made with lead paint or will fall apart VERY easily. This is generally done because they're cheap to make and they're generally bought by parents who don't realize the dangers and just see a cheap toy.
Tie 'N Tangle, a game based on wrapping other players in a web of nylon string, would otherwise be So Bad, It's Good based on its unintentional reference tobondage had it not been for its significant safety hazards: people can fall and hit their head, be strangled by the cord; etc. Even worse, the cord is too strong to be broken by hand, in case an emergency does happen. Jeepers Media suggests destroying this game, as its vintage worth is far outweighed by the hazards it possesses.
The Super Soaker CPS 2000 was the most powerful toy watergun ever released under the Super Soaker brand. It allegedly caused eye injuries when a target was shot in the face at close range, so it was subsequently redesigned to be less powerful and had warning stickers applied all over it telling the user to never aim it at anybody's face. Even the nerfed version was powerful enough to have recoil though.