Origami 6 Pointninja Star Instructions. To save on paper, or if your paper is quite thick, use one sheet and cut it in half, starting from step 4. You can get it here.
You can start with any size square of colorful paper. With one of the four squares, fold it in half by folding the upper left corner to the bottom right corner, then. If you're using origami paper, start with the color side down.