Kids can't resist sharing jokes (even you try to stop them), so they always need a fresh supply. We've stuffed the pages of this little book with the funniest knock-knock jokes we could find. Old favorites, new favorites, and a few festering stinkers—all guaranteed to make kids laugh out loud.

Here's a sampling:

Knock, knock.
Who's there?
Cowsgo.
Cowsgo who?
No, they don't. Cowsgo MOO!

Knock, knock.
Who's there?
Nobel.
Nobel who?
No bell, that's why I knocked!

Knock, knock.
Who's there?
Interrupting pirate!
Interrup—
ARRRRRRRRRR!