In Mexico, and maybe elsewhere, there is a plastic baby Jesus hidden inside the cake to represent the Nativity, and whoever gets the baby Jesus gets the privilege to host a party on February 2nd (they must buy tamales traditionally), which is the Fiesta de la Calendaria or Presentation of Jesus at the Temple.
![User Image - Blocked by "Display Image" Settings. Click to show. User Image - Blocked by "Display Image" Settings. Click to show.](https://graphics.gaiaonline.com/images/s.gif)