[[quoteright:238:[[WesternAnimation/FamilyGuy http://static.tvtropes.org/pmwiki/pub/images/suntzu1_7622.png]]]]
[[caption-width-right:238: [-"[[JustAKid Stewie, those books aren't for babies...]]"-] ]]

->'''European See-n-say:''' The cow goes SHAZOO!
->'''Stewie:''' ... it most certainly does NOT.
-->- From ''WesternAnimation/FamilyGuy'' [[http://www.youtube.com/watch?v=LDyXdAf3LR0 (see here for context)]]

Genius is a very rare thing, and it often takes years of education, study and work to attain it. But genius can begin to show itself at a very young age, resulting in {{Teen Genius}}es and [[ChildProdigy Child Prodigies]]. But what happens if it shows up even sooner than that? The result is the Brainy Baby.

The Brainy Baby is any infant with the intelligence of a rocket scientist. Not only can he speak, but he can speak 10 different languages fluently, know the complete works of Creator/WilliamShakespeare, and figure out how to invent time travel, all just coming out of the womb. The baby may be an InstantExpert if they're actually shown in the process of learning any of these things, given how little time they've even been alive, or they might just ''know'' them in a similar way to how someone who says ScrewLearningIHavePhlebotinum can increase their knowledge by boosting their intelligence.

This is most commonly PlayedForLaughs, especially when the baby's hypercompetent in areas that would call for some amount of physical prowess, rather than just intellect; having a baby be TheAce, besting grown men and women at everything they do, is inherently funny. However, it can also be played straight if the intent is to show that the character has such an exceptional brain that they are to a ChildProdigy what a ChildProdigy is to a "normal" genius.

Some cases of this trope are actually smart adults or teenagers who've been subjected to [[FountainOfYouth reverse]] [[MerlinSickness aging]]. Others are some variety of [[{{Immortality}} immortal]] and [[ReallySevenHundredYearsOld age much slower physically]] than mentally.
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!!Examples:

[[foldercontrol]]

[[folder:Advertising]]
* Ads for baby formulas abuses this trope, especially in Hong Kong, with play-school age children demonstrating remarkable vocabularies, problem-solving abilities, and mathematical skills. An egregious example, courtesy of Abbott Laboratories, is [[http://www.youtube.com/watch?v=4cWp7VTEPTs this]]
** Parodied in the UK by an advert which showed a baby of about six months who had arranged his alphabet blocks to spell "PAEDIATRICIAN".[[note]]If you're confused, ''paediatrician'' is the British spelling of ''pediatrician''.[[/note]]
[[/folder]]

[[folder:Anime & Manga]]
* Ivan Whisky/Cyborg 001 of {{Cyborg 009}} plays the trope straight, but in the 2001 one he's a subversion. He's a very powerful telepath and telekinetic with the intelligence level of an adult, but also is trapped in the body of a baby since he was (unwillingly) given all of this through cyborg enhancements. This means, poor 001 is NotAllowedToGrowUp and, unless he's given a new mechanical body, he will remain as a Brainy Baby ''forever''.
* Pulmo Allen of ''Amuri in Star Ocean'' is the commanding officer of a SpaceStation, wears make-up and high-heels, and is called 'Professor' by her elders, all at the tender age of 3. The fact that she is an [[{{Mutants}} Adapter]] probably has something to do with it.
* Turbo [[spoiler: Norimaki]] from DrSlump becomes this after [[spoiler: being killed by aliens and then revived by them]], gaining PsychicPowers and a genius-like intellect in the process.
* In ''Manga/KatekyoHitmanReborn'', there the Alcobaleno, who are known to be the 7 strongest babies in the world. They are one of the cases of reverse aging, as they were cursed in the past.
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[[folder:Comic Books]]
* Baby Brain in the ''SevenSoldiers: The Manhattan Guardian'' flashbacks to the Newsboy Army.
* Valeria "Val" Richards, the second child of [[ComicBook/FantasticFour Reed and Susan Richards]], was revealed to be a genius... as an '''''infant'''''. She takes after her good old TeenGenius dad, a borderline ChildProdigy himself, who privately speculated that she would start playing chess by the time she reaches '''''age 2'''''.
* TheAdventuresOfBarryWeenBoyGenius: Barry used to be this, as shown in flashbacks. As an example, he built his first telescope when he was eight months old.
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[[folder:Film]]
* The premise of the movie ''Film/BabyGeniuses'' is that all babies are like this until just before they learn to speak, at which point their intelligence collapses.
* In the Creator/RobertRodriguez movie ''{{Shorts}}'', two brothers use a wishing rock to wish one of them were super smart. The wish is granted to their baby sister, who informs them through telepathy.
* In SkyHigh, the super-genius professor becomes one of these after [[spoiler: the [[FountainOfYouth Pacifier]] is fired on him along with the rest of the school. His intellect remains completely untouched, but since his body is that of a baby he needs to use a machine to talk to the cast, even snarking a little about needing a change of diapers later.]]
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[[folder:Religion, Folklore, and Mythology]]
* The eponymous character of the medieval Jewish satirical work ''The Alphabet of Ben Sira'', from the moment of birth, is both fully capable of speech and much more intelligent than the adults he encounters (and [[SmugSnake never lets them forget it]], either).
* Taliesin, the legendary bard of Medieval Wales, was not only able to speak at birth but compose poetry and song. This is because he was reborn from Gwion Bach, the poor slave who accidentally drank some of the witch Ceridwen's potion of inspiration.
* Legends of {{Merlin}} often have him suddenly speaking perfectly around the time he is weaned. This is convenient, because this is also around the time when his mother is about to be put to death for getting pregnant out of wedlock; Merlin, with his prophetic knowledge, testifies that his mother was [[ChildByRape raped]] [[HornyDevils by a demon]] in her sleep and thus gets her spared.
* According to Literature/TheQuran, {{Jesus}} (who, remember, is revered as one of the greatest prophets in UsefulNotes/{{Islam}}) spoke shortly after being born to declare he was a prophet of God. It doesn't say if he talked afterward.
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[[folder:Literature]]
* Jake and Zoe's daughter Erin, from the ''Literature/CallahansCrosstimeSaloon'' series.
* Sunny from ''ASeriesOfUnfortunateEvents''.
* A rare serious version is Bean in ''[[EndersGame Ender's Shadow]]''.
* [[{{Ubermensch}} John Wainwright]] of ''Literature/OddJohn'' by Olaf Stapledon is also a serious version.
* Jon 'Jack' Remillard in ''JackTheBodiless'', by Julian May.
* The eponymous ChildProdigy of ''Millicent Min, Girl Genius'' was apparently one, since she mentions that, when she was two, she could read chapter books intended for children around the age of ten.
* [[NoNameGiven The abbot]] in ''Discworld/ThiefOfTime'', who retains his personality and memories when he [[{{Reincarnation}} reincarnates]] and is currently in the body of a toddler.
* Baby ''Literature/{{Matilda}}'' taught herself to read from newspapers lying around on the floor, and was very well-spoken for her age.
* In ''{{Twilight}},'' [[{{Dhampyr}} Renesemee]] is [[InformedAttribute supposedly]] as intelligent as an adult, though it's a bit ambiguous because a.) she also has RapidAging and b.) she still tends to act more like a baby than an adult. Nevertheless she's able to read within a few weeks of birth, at which time she looks about three.
[[/folder]]

[[folder:Music]]
* MC Frontalot's song "Bizarro Genius Baby".
[[/folder]]

[[folder:Video Games]]
* Baby Amelia Earhart in the ''VideoGame/SamAndMaxFreelancePolice'' episode, "The Tomb of Sammun-Mak". As the series has a tendency to reuse characters, Baby Amelia was present in Season 2, but they're not the same character: in season 2, it was the adult Earhart who had gotten in TheBermudaTriangle and drunk too much from the Fountain of Youth, where in Season 3 it was actually the young Earhart as a baby. Either way, both of them are very eloquent, and the one who ''wasn't'' an adult goes on tomb-raiding adventures in Egypt.
* Dr. Fetus from ''VideoGame/MeatBoy'' series takes this to the next level.
* Baby Head/Hoover from ''CaptainCommando''.
* If the character profiles in ''VideoGame/SuperSmashBros'' are to be believed, the Yoshi race in the ''Franchise/SuperMarioBros'' series are an entire species born with a very high I.Q.
[[/folder]]

[[folder:Western Animation]]
* Pictured above: Stewie of ''WesternAnimation/FamilyGuy''. A big part of the character's humor comes from him being a super-intelligent MadScientist (probably the most intelligent character on the show, in fact), but lacking some extremely basic knowledge that only babies would not know. For example, he [[http://www.youtube.com/watch?v=YTgYIonBg0s still gets confused by the peek-a-boo thing]].
* A minor character of ''TheProudFamily'' is a super-intelligent infant who always seems to enjoy pestering Oscar. He speaks in a deep voice and is always outsmarting and embarrassing Oscar Proud. He also doesn't seem to reveal his intelligence to anybody but Oscar.
* "Baby Weems", a segment in WaltDisney's ''Disney/TheReluctantDragon'', is about a baby who can speak eloquently from birth. He becomes a celebrity and confers with some of the most eminent minds of the day, but all that fame separates him from his parents, who can only see him from afar.
* Diaper Man in ''TheMightyHeroes'' cartoon. He was actually the leader and "brains" of the title group.
* [[WesternAnimation/DextersLaboratory Dexter]], as seen in a flashback episode "Labretto".
* Maggie [[TheSimpsons Simpson]] certainly qualifies. She's led a revolt in daycare, successfully driven a car for miles (albeit into a prison wall), and sniped mobsters without being seen...with a shotgun. And the '''''ONLY ONE''''' bold enough to shoot [[KarmaHoudini Mr.]] [[BigBad Burns]] [[spoiler:with his own gun after he stole her candy]]!
** [[spoiler:Candy nothing, it's heavily implied that Maggie knew well beforehand that Burns deserved to get shot. At the town hall meeting, when everyone else was yelling about [[KickTheDog various things Burns had done]], when Marge added that Burns was "causing us all to yell" you could see on Maggie's face that she shared Marge's anger.]]
** She's saved Homer's life ''how'' many times now? And where did she learn how to swim and fence?
* At the ripe old age of ''one month'', Pound and Pumpkin Cake from ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' are very intelligent and very ''mischievous'' little foals. And while surges of flight and magic ability are apparently normal for foals, that doesn't quite explain the twins' level of control over their abilities. [[spoiler:They even know how to speak -- [[HeartwarmingMoments their first words are "Pinkie" and "Pie".]]]]
* Ike from ''WesternAnimation/SouthPark.'' At age three he can barely speak, but gets to go to kindergarten early and apparently reserves the TV every night to watch the news. In one episode he reads several novels written for adults in the course of one day.
* A flashback on ''InvaderZim'' shows [[HeroAntagonist Dib]] spelling "ALIENS" out with his blocks when he was still in diapers. He also has vague memories of being experimented on, theorizing that extraterrestrials were trying to create a "genius super-baby."
** Irkens in general are given [=PAKs=] and uploaded with the collective knowledge of their entire species immediately after "[[PeopleJars birth]]." [[GeniusDitz Not that this makes them "smart,"]] though.
[[/folder]]

[[folder:Real Life]]
* Believe it or not, this ''does'' happen - say hello to [[http://www.telegraph.co.uk/health/children_shealth/10121175/Two-year-old-becomes-youngest-boy-to-join-Mensa.html Adam Kirby]], who was accepted to Mensa at age two after he taught himself to read and use the toilet at nine months.
[[/folder]]

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