Knock, Knock ... Who's there? Lettuce. Lettuce who? Lettuce in and you will find out! This book is jam-packed with over 400 knock-knock jokes that will have young readers chortling, chuckling, hooting, and howling. Including wacky wordplay, preposterous puns, silly situations and crazy cartoons, this joke book has it all! Fantastic fun for jokers, japesters, and jesters aged 7+. ABOUT THE SERIES: Bamboozle, befuddle and bowl over young readers with the Absolutely Epic Activity Books. This fab and funny series of puzzles and jokes feature wacky cartoon illustrations and are perfect for kids aged 7+.