When is a door not a door?

Why does a space rock taste better than an Earth rock?

What do you get when you cross an Elephant with a Rhinoceros?

When does a school paper cease to be a school paper?

Did you hear the one about the cross-eyed teacher?

Why couldn't the man buy a bakery?

What did the clumsy dolphin say to the whale when he bumped into him?

Why can't a bike stand up by itself?

Why wouldn't the bald man let anyone use his comb?

What did the duck say when she bought some lipstick?

Why didn't the grizzly wear any shoes?

How is a room full of married people empty?

Why didn't the leopard go on vacation?

How much does it cost for a Pirate to get his ears pierced?

What happened when a boat carrying red paint collided with a boat carrying blue paint?