Make some easy, inexpensive and incredibly cute 3-D Christmas trees with just some green paper. Fold a sheet of construction paper as shown and trim the excess. Continue folding the paper until you have a triangular tree shape. Cut the excess from the bottom. Open and refold each section and then make parallel cuts at each edge. Fold down the lower edge of each cut, and stand the tree up. Add any embellishments you wish. These are perfect for the dinner table, a holiday display area — just about anywhere.