As Bart and Lisa watch the evening news, Kent Brockman announces that a hole in the ozone layer has prompted a warning for residents to remain indoors. Bart and Milhouse grow increasingly bored. The boys rummage through Homer and Marge’s closet, and eventually don women s clothing. Homer hears the pair jumping up and down on the bed. Bart panics and falls off the bed, landing hard on his backside. The fall is so severe that Bart is transported to a hospital, where a cast is fitted over his posterior.

When Bart returns to school, he travels about in an electric wheelchair. Lisa notices her brother having a difficult time accessing the building. She mentions the lack of access ramps for the disabled to Skinner. He explains that the cost of building the ramps would be prohibitive.

Suddenly, Fat Tony appears and announces that construction of the new ramps has already begun. When the project reaches completion, Skinner inaugurates the ramp system in front of a crowd of students and teachers. But Bart, by this time, has recuperated from the accident, and is now more interested in using the ramp ways for extreme sports.

He roars over the cheaply built ramps on a motorized skateboard, causing them to collapse. Fat Tony then hands Skinner a bill for $200,000…and Skinner announces the school will be forced to shut down for good.

As Bart and Lisa watch the news on television, Kent Brockman announces that Springfield Elementary is again opening its doors. Shortly thereafter, Brockman interviews Jim Hope, of the Child Development Group, who announces plans to convert the school over to a more reader-friendly system of teaching. Hope encourages students to bring their toys to class, and later, he quizzes them about their likes and dislikes. He then asks the children to describe what they would consider to be the perfect toy.

Meanwhile, behind a one-way window, Lindey Naegle eavesdrops on the class, writing notes on a clipboard. Lisa contributes some possible names for the theoretical toy, including "Funzo." Shortly thereafter, Lisa opens a broom closet door and discovers a hidden research room, complete with a scary metallic skeleton of a talking doll.

Lisa escorts her parents and Chief Wiggum to the closet, but when she opens the door, it turns out to be an ordinary broom closet. Later, while watching television, Lisa happens upon a commercial for Funzo, a cuddly doll that also shoot missiles. Lisa realizes that the mysterious group that took over her school was, in reality, using the children for marketing research for the development of a new toy.

Lisa and Bart infiltrate the Child Development Group’s headquarters by sneaking past security guard Gary Coleman. The children confront Hope about their ruse. The pair are given a Funzo doll in hopes of making things right. Bart eagerly accepts the offer. But when the children return home, they realize the Funzo doll is programmed to destroy the competition’s toys. Horrified, Lisa races to a nearby store and attempts to alert shoppers about the crisis. But her warning goes unheeded, and customers smash open a glass door and storm the store, many rushing out with Funzo dolls.

Lisa realizes there is still one last hope. She and Bart go door to door and distract residents with Christmas carols while Homer sneaks into homes and steals the Funzo dolls. Eventually, Homer throws a sack filled with the toys into the Springfield Tire Fire. A Metallic skeleton of one of the toys walks out of the inferno, but Gary Coleman beheads it with a knife. The Simpsons invite Coleman to join them for Christmas dinner.