A zany, unpredictable picture book from this best-selling and hilarious author/illustrator couple. Tadpole loves his rainbow friend, the caterpillar, and she tells him she loves everything about him. “Promise that you will never change,” she says. But as the seasons pass and he matures, his legs grow, and then his arms – and what happens to his beautiful rainbow friend? As he sits on his lily pad, digesting the butterfly he has just eaten, he little realizes that now he will never know! Follow the only-to-be-expected changes of a tadpole and a caterpillar to their natural conclusion – and see the end to a beautiful friendship.