Take a sheet of printer paper or note book paper and make a perfect square. Fold it in half and tear it along the crease line.
Step 2: The Tricky Part
Fold each piece in half long ways. Turn them so the open side is facing down. Now place them like so in the picture and fold the corners up.Now take the big part and fold it up st the sides are flush. Flip it over and once more. do the same with the other piece. Now fold the begging corners and ending corners to the center.
Step 3: Assembly
After you have finished the other one, put the to pieces together. Make sure the open slits are on the outside.(see picture) Now tuck the corners into the slits on both sides.Flatten all the creases, pick it ou and have fun!