Granny Baby
Granny Baby (Title Card)

The title card for Granny Baby.

Episode 5A
Season 1
Airdate September 20, 2002
Invention Anti-Aging Tonic
Previous The Big Pinch
Next Time is Money

Granny Baby is an episode of season 1.


Jimmy's Grandma comes to babysit while his parents are off on their second Honeymoon, much to Jimmy's dismay. But the babysitter role is reversed when Jimmy has his Grandmother drink his youth tonic and she turns into a baby!


The episode begins with Jimmy's parents going on a honeymoon and they tell him that Granny Neutron is coming to look after him, or rather he is going to look after her. His parents also make him promise to not conduct any experiments on her as he had done in the past. After a while Granny begins to tell stories that are gross to Jimmy and so he goes to his lab and creates a youth potion. He expects it to only make her young enough to not be so bothersome to him and sneaks it in with her medicine. After she drinks the green liquid there is a flash of light but instead of a young adult, in Granny's place is a sweet looking diapered baby girl, cooing. Granny can surprisingly still talk as a baby. Jimmy begins panicking then asks where she got her diaper from. Granny replies saying she was already wearing it. She then suddenly poops herself and annouces that she needs her "diadey" changed as greenish stink lines start rising up from her now soiled diaper. Flustered, Jimmy orders Goddard to do it but he refuses out of disgust. Upset that no one is changing her Granny begins to cry loudly only to stop when she poops her diaper for the second time. Not knowing how to change a diaper Jimmy asks Goddard for help and he suggests they get Cindy to help them. Jimmy flat out refuses at first but changes his mind after she poops her diaper a third time, whining about wanting someone to "clean her poopie". Jimmy builds up the courage to go across the street. Luckily Cindy is in the middle of a garage sale with Libby Folfax. At first the girls fawn over the adorable Granny baby, that is until they both get a whiff of her smelly diaper, which is still radiating green stink lines. They are taken more aback when the baby begins speaking and cracking jokes, mentioning that she has a rash. Jimmy explains the situation to the girls, before being interrupted by Granny saying the stench from her dirty diaper is making her lightheaded. She instantly reverts to her infant state when she spies a "dolly" on the table. Cindy gives her the doll. Cindy asks how long will she be a baby, to which Jimmy says he is unsure, but has to change her back before his parents return. Cindy asks how many diapers they will need, to which Granny responses by pooping three more times in her diaper and jokes that they should err on the side of hundreds. Cindy finally complies and they head off to the store together to buy the necessary supplies.

While at the store, Granny becomes cranky being in her car seat and starts crying again until Cindy agrees to let her smack her with her rattle. She agrees, much to her annoyance. Granny giggles and seems to be enjoying being a baby. Some nearby people begin to observe the baby speaking and they are shocked and enthralled. The people then begin to chase after Cindy, Jimmy, and the grandmother, but not until they have gathered all the diapers and supplies needed to turn the grandmother back to normal. Cindy quickly changes the baby's dirty diaper. Meanwhile, Jimmy's parents are on their way home early, as Hugh had gotten into a fight with a large eagle. Jimmy begins to quickly make the antidote, but the people are still intent on hearing the baby speak. Jimmy then sets Cindy on the job of completing the antidote. He then convinces the people that the baby was actually a doll and the crowd quickly disperses. A few seconds later Cindy returns with the antidote placed inside a baby bottle. Granny Neutron drinks from it and is returned to her normal age right as Jimmy's parents pull up into the driveway. Cindy leaves to go back over to help Libby as Carl and Sheen arrive. Feeling thirsty, Carl accidentally drinks from the baby bottle containing the antidote and becomes an elderly man. He then gets the urge to dance badly and dances with Granny Neutron as the episode ends.


  • Granny's diaper does not seem to get bigger the more she poops in it.
  • Granny Neutron is Hugh's mother, but in Clash of the Cousins all of Hugh's relatives look more similar to him than she does.
  • This was a comic story, but now it's been made longer. 
  • Jimmy says that he made Granny magnetic in the past as a prank, which made Hugh and Judy angry.
  • The "Video Tubbies" are mentioned, and referenced the Teletubbies, in the prefix tele- referring to telecommunications, which a video can be a part of.
  • Goddard's sound system makes an appearance (When Pants Attack).
  • Baby Granny Neutron looks identical to her grandson Baby Eddie and baby Beautiful Gorgeous.
  • This is the first episode Carl turns old.

Special Guest Star

Phyllis Diller - Granny Neutron


  • Cindy: "Well, how many diapers do we need?
    Granny: (Poops purposely 3 times) Well, I'd err, on the side of hundreds."
  • Libby: "She talked!"
  • Granny: "Now that we got that out of the way I have a rash brewing down here that would make a red-hot chili pepper look pale."
  • Jimmy: "Where'd you get the diaper? "
  • Granny: "I was already wearing it." (Poops in her diaper)
  • Granny: Ooohh...I need my diadey changed!
  • Jimmy: Goddard change diaper (He refuses)
  • Granny: Change me now! (Cries loudly before pooping her diaper again) 
  • Granny: "Could we hurry up? I'm getting dizzy from my own fumes here!"
  • Granny: "I'm bored. Make a funny face and let me hit you with my rattle."
  • Cindy: "No!"
  • Granny: (cries loudly as Cindy covers her ears)
  • Cindy: "Okay, okay!" (makes a funny face and Granny hits her with the rattle)
  • Granny: "It's fun hitting you!"
  • Cindy: "How long is she gonna be a baby?"
  • Jimmy: "Think, Think, Think! *Sees Granny's dolly in his mind; gets an idea* Brain blast!"
  • "Jimmy": "No way! I will never, ever ask Cindy for a favor!"

(Granny farts and then poops)

  • "Granny": "Clean my poopy!"

(farts again)

The Adventures of Jimmy Neutron: Boy Genius Season 1 episodes
When Pants Attack | Normal Boy | Birth of a Salesman | Brobot | The Big Pinch | Granny Baby | Time is Money | Raise the Oozy Scab | I Dream of Jimmy | Jimmy on Ice | Battle of the Band | See Jimmy Run | Trading Faces | The Phantom of Retroland | My Son, the Hamster | Hall Monster | Hypno-Birthday To You | Krunch Time | Substitute Creature | Safety First | Crime Sheen Investigation | Professor Calamitous, I Presume | Journey to the Center of Carl | Aaughh!! Wilderness!! | Party at Neutron's | Ultra Sheen | Broadcast Blues | Professor Calamitous, I Presume | The Eggpire Strikes Back | Maximum Hugh | Sleepless in Retroville | Make Room for Daddy-O | Beach Party Mummy |}