Three King's Cake (or bread) is closely allied with the traditions around the Epiphany (January 6th). This date commemorates the visit the Three Wise Men made to the baby Jesus in Bethlehem. In Mexico, the day is a gift-giving holiday. Tradition states this bread be served, garnished with the "jewels" of fruit and nuts. Usually a small clay or porcelain doll is baked inside. The custom is that whoever finds the doll must give a party on Candlemas (February 2nd).
Now that you're all educated on the matter, here are some pics :) Enjoy!