The doll embedded in the Rosca de Reyes represents Baby Jesus, and whoever is fortunate enough to find it in their slice of rosca acquires the commitment to give a party on the following February 2nd, Candlemas Day, a celebration where tamales and atole, a corn-flour dish and a corn-based drink, are a must on the menu. More details: http://www.puertovallarta.net/fast_facts/rosca-de-reyes-january-6th-01.php