To make Christmas tree napkins, you will need the following supplies: green paper napkins, a pair of scissors, some ribbon or string, and a bit of glue. First, fold the napkin in half diagonally to form a triangle. Then, fold the triangle in half again, so that you have a smaller triangle. Next, cut a small slit in the center of the top edge of the napkin, about an inch down from the point. This will be where you insert the ribbon or string later. Now, unfold the napkin and use the scissors to cut a curved shape along the edges of the triangle, making