In Spain, children open some presents on Christmas Day, but most are opened at Epiphany. Some children believe that the Kings bring presents to them at Epiphany. They write letters to the Kings on Boxing Day, December 26th, asking for toys and presents. And on Epiphany Eve (January 5th) they leave shoes on windowsills or balconies or under the Christmas Tree to be filled with presents. Gifts are often left by children for the Kings, a glass of Cognac for each King, a satsuma and some walnuts. Sometimes a bucket of water is left for the camels that bring the Kings! If the children have been bad, the Kings might leave pieces of coal made out of sugar in the presents!