Why did Santa's elves go on strike at the North Pole?

They wanted to clause their contract and improve their working conditions, but it was a gift-wrapped ultimatum.

What do you call a group of cows singing Christmas carols?

A moo-sical choir

Why did the snowman go to the party?

Because he heard it was a cooler event.

Why did Santa install a new heating system at the North Pole?

Because the elves were always feeling a 'draft'.