Knock Knock Jokes for Kids Paperback 3rd Grade 4th Grade 5th Grade 6th Grade Description Knock Knock. Who’s There? Wooden Shoe. Wooden Shoe Who? Wooden shoe like a whole book full of awesome knock knock jokes? Product Details Weight 6.20 oz Dimensions 9.00 × 6.00 × 0.25 in Format Paperback Product Type Book Collection Under $7 Grade Level 3rd Grade, 4th Grade, 5th Grade, 6th Grade