Knock, knock. Who?s there?Don?t get so excited, it?s just a joke.Knock, knock. Who?s there?Anita to borrow a pencil.New from Zonderkidz, here?s a collection of knock-knock jokes that is both hilarious and wholesome. Lots of Knock-Knock Jokes for Kids is sure to send every kid you know to his knees in a breath-stealing, side-splitting, uncontrollable fit of giggles. It?s that funny. And with more than 350 jokes, the laughs are sure to never quit.