The Princess and Puss are up a tree blocking their ears and cringing due to a loud wailing noise coming from the castle. She explains that they have to look after her cousin, but he is "too noisy" with his crying so it is no fun. The Maid then calls the Princess in to play with him.
When the Princess enters, the baby is having his diaper changed, and then he cheers up but the Princess is still in a grumpy mood. The Queen sets the cousin on his play mat and leaves the two children to play. The baby initially wants to play with Gilbert, but the Princess disallows it, so he crawls over to the bugle and starts playing it. The Princess swipes it due to it belonging to the General, who wouldn't want it full of his saliva. Unfortunately, the Queen enters and sees the Princess with the bugle, assumes she's the one who played it, and scolds her for being too loud. Then, the General collects his bugle and is disgusted at the drool.
At lunch time, the baby plays with his mashed potato and the Princess joins in, but gets scolded by the Chef. The Princess is irate that her cousin wasn't also scolded, but the Chef and Maid point out that he is a baby and "that's what babies do". Adding insult to injury, the baby sends his whole plate flying onto the Princess's head, and the Chef and Maid laugh.
After lunch, the Princess sulks in her room about her cousin "getting her into trouble", while the King, Queen, and Maid play peekaboo with the baby outside. The Princess complains that her cousin is allowed to do things she isn't, and thus "has all the fun".
When she wonders why, the narrator suggests that it's because he's a baby, so the Princess goes outside wearing a bonnet, sucking a pacifier, and speaking gibberish. The narrator asks what she's doing, and she replies that she's "practising" being a baby because "babies have more fun". She drops down on all fours and crawls up to her parents and the Maid, pretending to cry. They initially think she "bumped her head", but then she explains that she's being a baby.
The General and Prime Minister show up, and the former plays with the baby, throwing him in the air. The Princess wants to have a go too, but she's too heavy to be thrown very high. Then, at dinner, the`Princess is served insipid green mash. She wants cupcakes, but isn't allowed them, and after dinner the Princess and her cousin get bathed and, much to her annoyance, put to bed despite it being far from bedtime.
Auntie comes to collect the baby, and the Princess, thinking she is finally out of the woods, sneaks downstairs and tries to go outside but is dragged to bed anyway.
This episode provides examples of
- Babysitting Episode: In this episode, the residents of the castle are babysitting the Princess's baby cousin.
- Baby Talk: When the Princess wants to be thrown in the air, she says, "Me a go", but no one understands, so she amends it to "Can I have a go?". She also says, "Cakey" to ask for cake.
- Blowing a Raspberry: The Princess blows a raspberry when she's trying to be a baby.
- Comically Missing the Point: When the Princess says that she's "practising" to explain her wearing a bonnet, sucking on a pacifier, and talking gibberish, the narrator says, "To make funny noises?".
- Covered in Gunge: At one point, the baby sprays milk from his bottle all over the King.
- Crocodile Tears: The Princess pretends to cry when she's pretending to be a baby.
- The Diaper Change: When we first see the baby in this episode, he's being changed.
- Goo Goo Getup: The Princess wears a baby bonnet when she's trying to be a baby.
- Go-to-Sleep Ending: The episode ends with Scruff and an unnamed duckling falling asleep in the pets' basket. The Princess also gets dragged to bed, although it's early, so it's unknown if she actually falls asleep.
- Karma Houdini: The Princess is scolded for throwing mashed potato but not her cousin. Justified, because the cousin is only a baby and a.) As the maid says, "that's what babies do", and b.) He likely wouldn't understand any kind of scolding or punishment anyway.Princess: "It's not fair! I'm not allowed to be naughty, or make a mess, or make a noise! How come he has all the fun?"
- Possession Presumes Guilt: The baby blows the General's bugle, but the Princess snatches it from him. The Queen comes in and due to the Princess holding the bugle, assumes she was blowing it and berates her for being "noisy".
- Punctuated! For! Emphasis!: At one point, the Princess says, "I want to be a BABY!".
- Speak in Unison: When the Princess says that she's being a baby, the King and Maid say at once, "A baby?!".
- Title Drop: Upon being told she's a big girl, the Princess says, "But I don't want to be a big girl; I want to be a baby." The Queen tells her not to be silly, and the Princess shouts, "I want to be a BABY!".
