Museum of Modern Bart

The Museum of Modern Bart was a museum of Bart in Bart's treehouse.

History
When Milhouse offers Bart 25 cents to see his $1000 bill again, he gets an idea and sets up a museum in his tree house, naming it "The Museum of Modern Bart". The museum is a resounding success, however, when Mr. Burns comes in and sees the bill, he claims it as his. When asked for proof of ownership, he shows Bart the bills indentation on his chest (when the bill was ejected from the ATM, it hit Burns in the chest, knocking him backwards before it was swept off). Bart is forced to give it back and close his museum, as now that there is no $1000 bill, no-one is interested in the museum. Lisa says that they have managed to collect $3000 from the museum so it doesn't matter anymore.