A kid's Christmas joke

Here's a joke I made up yesterday that you can pass along to your favorite Santa-believing child:

Q: What is Santa Claus made of?

A. Jollecules.

I'm reasonably certain that I am the only person who has come up with this joke, and I base that upon the fact that Google searches for "jollecule", "jollicule" and "jollycule" return zero English results. (Except one, which is a false-positive from Google Book Search - it thinks that "follicule" is "jollicule" because of a faded 1897 typeface.)

Of course, a reason why the joke may not work is because I don't know if little kids really know about molecules.