Sister Halloween Costumes: Maggie and Lisa Simpson From "The Simpsons"
What to wear: For Maggie, you need a long blue nightie with a pacifier and a blue bow on your head. For Lisa, you just need an orange dress, orange shoes, and a pearl necklace.
How to act: Maggie's a baby, so act like a baby. Lisa is the genius of the family, so go around citing facts and starting up chemistry experiments.