In each Posada, children are given candles and a board, with painted clay figures of Mary riding on a donkey and Joseph, to process round the streets with. They call at the houses of friends and neighbors and sing a song at each home. The song they sing is about Joseph and Mary asking for a room in the house. But the children are told that there is no room in the house and that they must go away. Eventually they are told there is room and are welcomed in! When the children go into the house they say prayers of thanks and then they have a party with food, games and fireworks.
Each night a different house hold the Posada party. At the final Posada on Christmas Eve, a manger and figures of shepherds are put on to the board. When the Posada house has been found, a baby Jesus is put into the manger and then families go to a midnight Church service. After the Church service there are more fireworks to celebrate the start of Christmas.