Gerald the elephant is stunned when Piggie announces he is a frog. “You look like a pig. And your name is Piggie.” So Piggie explains the concept of pretending, which Gerald doesn’t get at all. When Piggie tells Gerald he can pretend, he contends he can’t. This is even slighter than most of the series’ previous books, but it does have a funny surprise ending, and kids get to consider just what it means to pretend. The familiar pictures get their action from Piggie hopping around and their humor from the droll expression on the elephant’s face. New readers will like this because the same word is repeated over and over: ribbit.