Meet Mr. and Mrs. Twit. This nasty couple just loves to play little tricks on each other. She feeds him worms instead of spaghetti. He slips a frog in her bed. On and on, each prank is more terrible than the one that came before. And here are the Muggle Wumps- a nice family of monkeys whom the Twits are training for the first Great Upside-Down Monkey Circus. The Muggle-Wumps don't like that very much. So the Muggle-Wumps. along with the Roly-Poly Bird, give the Twits the nastiest. biggest, most horrible surprise of all.