The Super Fun Sandy Mega Play Set is coming out in stores, but Mrs. O'Connor has just given the class homework. Betsy decides the right thing to do is follow the homework rules and finish her work before she goes out and gets the toy, but it may not be available if she gets to the store too late. Mrs. O'Connor brings caterpillars into the class. They learn all about the life cycle of a butterfly and then Mrs. O'Connor lets the class decide what to do with the beautiful butterflies after they're full grown.