To make your own ribbon tree you will need:
Cardboard or cone shaped base
Hot glue and glue gun
If you have a cone base already you can start gluing your ribbon to the base. If not you will need to make one with your cardboard. Figure out how tall you would like your tree to be. With a straight edge measure the height from one point to the next. Then with a compass or string draw an arch about 45 degrees. Cut out then glue or tape edges together.
Continue this all the way around then move up to the next row. Try to space the ribbon pieces in between the ones on the row below to overlap any ends. Continue this proses until you reach the top.Once at the top you can put a star or what ever kind of topper you would like. I just added some ribbon loops upward then wrapped a single piece around where the ends were glued to cover the seam.