Kids LOVE knock knock jokes, and this illustrated book by the New York Times–bestselling creators of the Happiness Is ... project will leave them in stitches! The World’s Best Knock Knock Jokes for Kids is filled with hundreds of corny, brilliant, and silly knock knock jokes—each paired with a small drawing that’s a sweet comic gem in itself. It’s the perfect book for road trips, rainy days, or those special moments when kids and parents can laugh together.