Fun Bums

Spiral-bound pages divided in half horizontally enable readers to mix up the top and bottom halves of goofy cartoon animals, resulting in hybrid creatures. Possible combinations include a yellow mouse's head and torso connected to the "bum" of a chicken that's just laid an egg; a kangaroo with a crocodile bum that sits on a chair; and a purple elephant with a pig's bum doing the splits. The simple phrases that appear opposite each new creature pretty much sum it up: "Frog's bum... lays eggs for breakfast." Parents will tire of the gag long before giggling preschoolers do. Ages 3%E2%80%935. (Apr.)