Knock knock.Who's there?Weirdo.Weirdo who?Weirdo you think you're going?Knock knock.Who's there?Ben.Ben who?Ben away for a while but I'm back now.Kids can't get enough of laughter--so they can't get enough of Rob Elliott's hilarious joke books! Now the author of the bestselling Laugh-Out-Loud Jokes for Kids offers this all-new collection of knock-knock jokes that will have kids and kids-at-heart busting a gut and asking for more.Rob Elliott is the bestselling author of Laugh-Out-Loud Jokes for Kids and Zoolarious Animal Jokes for Kids and has been a publishing professional for more than fifteen years. Rob lives in West Michigan, where in his spare time he enjoys laughing out loud with his wife and four children.