Tree decoration is a popular activity during the holiday season. It involves adorning a tree with various items to make it look festive and attractive. Common decorations include TINSEL, which is a thin, shiny material that is often hung from branches, an ORB, which is a round, spherical object, a STAR, which is a five-pointed shape, and icicles, which are long, thin pieces of ice. All of these decorations can be used to create a beautiful and unique tree.