These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
"Funny Aneurysm" Moment: Some of the real-world facts in some JumpStart games. Taking the original 2nd Grade for example, a space minigame allows you to visit Pluto ("the ninth planet from the Sun"), the postcard for New Hampshire has Frankie visiting Franconia Notch to see the Old Man of the Mountain (which today no longer exists), and the postcard for Florida features the no-longer-in-service Space Shuttle.
Idiot Plot: In JumpStart Advanced 1st Grade, the plot gets set into motion by the weasel bully Jimmy Bumples pushing a puppy named Squirt, breaking his scooter. The other characters are then determined to win the upcoming scooter tournament so that they can give the prize, a "totally-tricked out super scooter", to Squirt. Problem? One of the characters, Hopsalot, is a mechanical genius who can create devices that could somehow transform small objects ("powerups") into either complex scooter gadgets or complex (and huge) track obstacles. And yet apparently he can't fix a scooter.
Nightmare Fuel: The Glop Monster from the original JumpStart 1st Grade and Old Man Jenkins from the original JumpStart 2nd Grade.
They Just Didn't Care: Many of the bonus discs that come the games, such as JumpStart Around the World and JumpStart Adventure Challenge. Also, the various art games packaged with some of the JumpStart Advanced games. Let's take the one packed with the JumpStart Advanced 1st Grade, Art Club, as an example. It features no animation, a different voice actor for Frankie from the main game for no discernible reason, and no unique images of the characters - just stock art (sometimes modified). Also, the "stickers" they provide for you to put on the crafts are stickers from a previous (and much better) game (JumpStart Artist), except, for most of them, sports equipment (such as tennis racquets and footballs) is awkwardly stuck in the character's hands (apparently, the fact that the main game was about scooters made them want to give it a "sports theme"). Perhaps one of the most egregious faults is that there's no option to shrink or grow the stickers - which is worse than you might think, because the stickers often scale with each other very awkwardly (i.e. most of the stickers of Edison Firefly, who's supposed to be the smallest character, are huge).
The storylines of the spin-off series of workbooks are also this, featuring such things as a lizard from a cave painting coming to life for no explained reason and someone who kidnapped the princess being completely let off the hook - almost as if no one noticed. But it's kinda easy to forgive, since they're workbooks and you normally wouldn't expect them to have any kind of plotline at all.
Values Dissonance: Marcy has no problems referring to her adult stepbrothers note Marcy's mom married their next-door neighbor's dad, becoming step-siblings will all twelve of his sons.- some of whom have barely met her - as "her brothers", as if they grew up together. No one else seems to find it strange in the strip.