When Marty Q. Marvel the magician accidentally turns Mr. Bundy into a frog, the students of P.S. 88 don't know what to do! It's not always easy having a slimy, green-skinned amphibian for a principal. Even worse, Mr. Bundy has started playing leapfrog, swimming in the kindergarten sink, and eating students' fly collections. Will he ever be his old self again?