I'm Number One by Michael Rosen
A gentle, optimistic story about a bully who gets his comeuppance, from a Number One author-illustrator pair! I'm A One. I'm big A One. Let me tell you, A One rules. But without other people to wind his key, A One, big A One, is a useless, no-good No One! Luckily, Maddy and Sally and Sid find the perfect way to show the bully how much he really needs them.