Step #1: Take your piece of paper and cut it into a perfect square. Fold the paper into a triangle, taking one corner and lining it up to the other side. This will leave room on one side that, once cut, makes a square.
Step #2: Decorate both sides of the paper with whatever design you wish: a summer scene or just a fun design.
Step #3: Fold the paper diagonally into a triangle and crease it lightly. Repeat in the opposite direction as well and unfold for a creased "X" on the page.
Step #4: Cut along the creases about halfway to the middle of the paper. Be sure not to cut all the way through.
Step #5: Bend each corner towards the middle. Make sure to bend, not fold. Once all 4 corners are in the middle, push the pin through them all as well as the straw or eraser. Be careful not to hurt yourself with the pin!