My wife and I are in Barcelona at the moment, and yesterday we learned about Caga tió, or "Shitting log", Catalan's version of Santa Claus. It's literally a log with a smiley face.

http://en.wikipedia.org/wiki/Ti%C3%B3_de_Nadal

Each family buys or makes their log and covers the rear with a blanket. Children then hit the log with sticks until it poos presents, often while singing one of several songs.

https://www.youtube.com/watch?v=dB_N7-HXTlI

Certainly one of the highlights of our trip.