George Shrinks (The World of William Joyce)

When George wakes up one morning to find himself shrunken to the size of a mouse, he also finds a note left by his parents, instructing him to clean his room, get breakfast, and look after his baby brother until they get home. Undaunted, George sets out to do just that, until he comes face-to-face with the family cat that has remained . . . family cat-sized!