Home > Books > Lots of Knock-Knock Jokes for Kids Lots of Knock-Knock Jokes for Kids Family-friendly jokes. A wide variety of joke styles. Fun illustrations that add to the fun. Perplexing yet funny riddles. Bonus Q&A jokes. Price: $3.99 Note: Prices on some products change frequently. To see more details, check the latest price, or to purchase, please visit the link below: