How to fold a boomerang?

To prepare a rectangular piece of paper to fold the boomerang, the upper and lower edges should be aligned with the midline crease after folding. Then fold the upper right corner and the lower left corner in half along the crease, and do the same after turning it over. The pieces of paper on both sides are folded inward into boomerang shape, the middle part is pressed outward into two wings, and then pressed downward to form the final shape. After throwing, the boomerang will spin in the air and fly back.