I Will Surprise My Friend! (an Elephant and Piggie Book), Hardcover/Mo Willems
Gerald is careful. Piggie is not. Piggie cannot help smiling. Gerald can. Gerald worries so that Piggie does not have to. Gerald and Piggie are best friends. In I Will Surprise My Friend , Gerald and Piggie want to play a game and surprise each other-but the biggest surprise is the one they least expect.