Knock knock. who's there? ivan.
ivan who? ivan suck your blood (vampire joke from horrid henry)

Should I tell you a joke about a wall. Yes please. No you will never get over it Lol

what did the girl octopus say to the boy octopus? May I hold your hand hand hand hand hand hand hand hand? Lol

Knock knock. who's there?
Justin. Justin who?
Justin time for school Lol

Knock knock. Who's there?
Keepout, Keepout who?
Keepout of this

Knock knock. who's there?
Nonofyour
Nonofyour who?

Nonofyour business lol

These are funny...some need improving though. Good joke-work!

Hahaha I lolled at the 3rd joke, looool!!!! ~Ellie~

Trololol! Wait.. is it "None of your business"? I also have a classmate and his name was Justin. He also made a joke. He told me. "Knock, Knock!" Justin said. "Who's there?" I said. "Justin." Justin said. "Justin who? Yourself?" I said. "No, Juice teen." Justin said. And my brother have one too..
Knock, Knock!
Who's there?
Seal
Seal who?
Heal the seal.