Get kids laughing with this joke book filled with side-splitting, gut busting knock-knock jokes! Perfect for trips and travelling or for any time, kids (and adults) will find themselves rolling with laughter as they deliver these knock-knock jokes. Some topics include: Knock Yourself Silly!; I'll Knock-Knock Your Door Down; Rap, Rap, Rap!, and more! Recommended for ages 8 to 11. 112 pages