To make a Christmas cone tree, start by gathering some green construction paper or cardboard, scissors, glue or tape, and some decorations like small ornaments or lights. Cut the green paper or cardboard into a wide cone shape, with the top edge slightly smaller than the bottom edge. Fold the cone in half lengthwise and glue or tape the edges together to create a strong base. Add some ornaments or lights to the tree and decorate it however you like! Finally, place the tree on a table or mantle for the perfect festive touch.