To make a ribbon Christmas tree topper, you'll need a piece of ribbon about 36 inches long, some green wire, and a star ornament or decoration. First, tie a knot at one end of the ribbon, leaving the other end free. Next, bend the wire into the shape of a star, making sure to leave enough room for the ribbon to pass through. Then, thread the ribbon through the star, and secure it with a knot. Finally, wrap the wire around the tree, creating a loop, and hang the star ornament on top. And that's it! Your ribbon Christmas tree topper is complete!