Why did the chicken go to the seance?

What do you call a bear with no teeth?

What did one hat say to the other?

What do you get when you cross a snowman and a vampire?

How does a penguin build its house?

Knock, knock.
Who’s there?
Lettuce.
Lettuce who?
Lettuce in, it’s freezing out here!

Why did the bicycle fall over?