Open the door to meet a gang of googly eyed poopers.

The Number 1 book of Number 2 jokes!

Open the door to meet a googly-eyed gang of creatures who realllllly need to go! Young readers will love knock-knocking on toilet doors to discover a joke that stinks behind every one.

This easy-to-follow format is a pooptastic introduction to the world of comedy for little jokers, sure to have the whole family laughing like a drain.

And for more hilarious knock knock fun:
Knock Knock Who's There
Knock Knock Merry Christmas