Having been found to have only been activated for five years, the school system declares that Jenny has to be moved into a grade level that matches her "age". Now Jenny finds herself in a new situation... kindergarten.
Amber: We're playing house. I'm the mommy and Kevin is the daddy. Gerald can be the smelly uncle and Alex can be the pool boy.
Jenny: And who should I be?
Amber: You, you can be the dog.
Jenny: I'm not gonna be the dog.
Alex: And I'm not gonna be the pool boy. I'll be the robot! Doot Doot Danger Danger.
Jenny: Hey, if anyone should be the robot it should be me!
Amber: How can you be the robot if you're the doggy?
Jenny: I actually am a robot!
Alex: I am an actual robot. Zoot Zoot Rfft Rfft Rfbt Rfbt.
Jenny: But, but, but? I am the Robot!
Alex: I am the robot, I am the robot!
Kids: You are the robot, You are the robot!
Jenny: But, but, but?
Ms. Binky: You are the robot, You are the robot!
Jenny: But, but, but, but? [Gerald laughs the robot]
Jenny: But, but? I am the robot!
Kids: You are the robot zoot zoot, You are the robot zoot zoot, You are the robot zoot zoot!
Jenny: This is so stupid! [The Kids gasps and says the s word]
Amber: She said the 'S' Word! [Alex cried out]
Ms. Binky: That's a time out, young lady! Come with me!
Brad: (singing) A-minky-minky-minky-minky-minky-minky-minky-minky-MOMO! The Minky Momo is an attitude, the Minky Momo is a mellow mood. You're Momo when you're drinkin' lemonade, you're Momo soakin' in a marinade. I know you're Minky, 'cause I'm Momo, too. And so I know what you're goin' through. But there's no mo' Momo whenever I ... get ... close ... to ... you! (stops singing) Man, I hate that song!
Jenny: What's that noise coming out of your throat? Are you sick or something?
Jenny: This ... is ... so ... STUPID!!! (everyone gasps)
Amber: She said the s-word!
Kindergarten Deliverer: Don't worry, we're taking you to a place with all the cookies you can eat!
Jenny: ...But I don't eat.
Jenny: Me? I'm a high school student. A nap in the middle of the day sounds ... pretty good.
In "I Was a Preschool Dropout," we learn that the time period of My Life as a Teenage Robot is approximately 2130.
In "I Was a Preschool Dropout" Jenny said that she didn't remember Superbowl C (100 in Roman Numerals). Assuming since she was 5 years old, Superbowl C was probably at least 6 years ago because Brad mentioned it, therefore making this show having to take place after 2070 since the year 2003 has Superbowl XXXVIII (38 in Roman Numerals).
The title of the episode states that Jenny was sent back to preschool, when in fact she was sent to kindergarten.
When Alex said "I am the robot". He is doing the 'robot', a very old dance imitating a robot's movement.
When Brad sings the song "Minky Momo" it was an anime in the 1980's about a young girl with magic powers (Mahou no Princess Minky Momo). It was a retelling of the Japanese fairy tale Momotaro. In the story, a boy born from a peach becomes a small village's only hope against oni (ogre-like monsters) and his three sidekicks are a dog, a pheasant and a monkey. Those animals became the girl's pets in the show.