December 16 is the first day of the Christmas Novena, a devotion consisting of prayer said on nine successive days, the last one held on Christmas Eve. The Novena is promoted by the Catholic Church as a staple of Christmas, and is very similar to the posadas celebrated in Mexico. It is a call for an understanding of the religious meaning of Christmas, and a way to counter the commercialism of the Christmas season. Individual traditions concerning the Novena may vary, but most families set up a "pesebre" (manger scene), sing religious Christmas carols called villancicos accompanied by tambourines, bells, and other simple percussion instruments, and read verses from the Bible as well as an interpretation which may change from year to year. Novenas serve as beautiful religious gatherings as well as learning environments for young children since kids have a central and active role in the celebration of the Novenas (they read prayers, sing, and play instruments guided by their family). From December 16 to 24, games called "aguinaldos" are played after having made a "pinky promise" deciding the prize for the winner and the punishment for the loser. The games include "Hablar y no contestar" (Talk but don't answer), "Dé pero no reciben" (Give but don't receive), "Pajita en boca" (Straw in the mouth), "Tres pies" (Three feet), "Beso robado" (Stolen kisses), and "Si y al no" (Yes or no). Churches offer dawn and nightly masses during the nine days of the novena, culminating with the Misa de Gallo (Rooster's Mass) on Christmas Eve at midnight.