Peek-a-Moo!By: Marie Torres Cimarusti Illustrator: Stephanie Petersen Little ones love to play peek a boo! With its bright, quirky animals and oversized flaps to lift, Peek a Moo! is sure to be a read aloud favorite. Readers play peek a boo with a different animal on each page, guessing what it is, then lifting the flap to find out. Each animal has a different sound that becomes part of the peek a boo game: Guess who? "Peek a moo!" says the cow. "Peek a squeak!"