Knock-knock KidsKnock, knock. Who’s there? Cow says. Cow says who?No, a cow says moo.Why it works: The visitor name is re-heard as part of a phrase, which completes the knock-knock wordplay.Copy jokeSave▲ 0Topics connected to this jokeCleanFunnyKidsKnock-KnockKnock-Knock Jokes for KidsPunPuns for Kids