There are approximately two billion children (persons under 18) in the world. However, since Santa does not visit children of Muslim, Hindu, Jewish or Buddhist (except maybe in Japan) religions, this reduces the workload for Christmas night to 15% of the total, or 378 million (according to the Population Reference Bureau). At an average (census) rate of 3.5 children per household, that comes to 108 million homes, presuming that there is at least one good child in each.

Where does Santa stay when he's on holidays?
At a Ho-ho-tel!

Wuz de nite befo Crimmus;

What does Mrs. Claus sing to Santy on his birthday?
"Freeze a jolly good fellow!"

Wuz de night befo' Chrisma, wit de moon big lak jumbo,

How does Frosty the Snowman get around?
On an "ice"-icle!

You do know what would have happened if it had been three wise WOMEN instead of men, don't you? They would have asked for directions, arrived on time, helped deliver the baby, cleaned the stable, made a casserole and brought disposable diapers as gifts!

What does Rudolph want for Christmas?
A pony sleigh station!

Knock. Knock.
Who's there?