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.This collection provides fun for the whole family and includes bonus jokes and riddles too!.