 Lisa attempts to prove everyone that she is smarter than Maggie and teaches Maggie false information.Marge, realizing this, scolds her for trying to sabotage her sister's education and that if that is how she really feels, then she should not be her sister's role model.Heartbroken, she leaves the house and hides in the Natural History Museum, where there is no chance of Homer and Marge finding her, until Chief Wiggum, Lou and Eddie find her belongings in there.