how did christmas trees begin

Well, that's a pretty interesting story. The first Christmas trees were actually decorated with apples, candles, and nuts, back in the Middle Ages. The tradition of decorating a tree with candles actually came from a German tradition, where they used to bring a tree into the house and decorate it with lighted candles. Over time, the tradition of putting presents under the tree also became popular. Eventually, the Christmas tree became a symbol of joy and happiness, and a way to celebrate the holiday season.