2001 Knock-Knocks Tongue Twisters Author:Mike Artell, Charles Keller, Joseph Rosenbloom, Ronny M. Cole, Chris Tait These knock-knocks and tongue twisters are so funny...
...you'll want to tell them to all your friends! And with thousands of jokes to choose from, the laughter never has to end.
Try this one for a good giggle:
Knock-knock Who's There? Hobbit. Hobbit who? Hobbit letting me in.