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

Because they wanted to elf-improve their working conditions!

What do you call a present that arrives after Christmas?

A past present.

Why did Santa's elves start a North Pole wellness program?

Because they needed to work through some Claus-trophobic issues.

Why did Santa's elves start a training program for reindeer at the North Pole?

Because they wanted to help them deer-velop their skills.