Lisa poses as a college student after befriending college girls who can pass for elementary school students because of their height. Meanwhile, a Chinese mosquito infects Bart and Bart must live in a plastic bubble.

!! Tropes:

* IdeaBulb: One episode of [[ShowWithinAShow Itchy and Scratchy]] features the titular characters as Amish. Itchy has an idea and a lit candle appears.
* HonorBeforeReason / AlphaBitch: Lisa's friends, when they discover she's not a college student, don't want anything to do with her for being an 8-year old even if they connected so well with her.
* {{Jerkass}}: Milhouse. He followed Lisa and ruined her happiness simply because he was being a nosy brat.
* OlderThanTheyLook: The college girls who believed Lisa to be one of them.