Book excerpt: From Matthew Cordell, the author-illustrator of the Caldecott award-winning book Wolf in the Snow, comes this delightful picture book that's as charming as it is fun. It's raining. There's nothing to do. Ruben is bored. But things start looking up when his grandmother gives him and his little brother some gum. Gum is fun. There's just one problem with gum—it tends to make a mess! Uh-oh. . . .