If you want something that spins as it falls, try a basic cut: Cut a strip of paper (about 1x6 inches). Cut a slit halfway down the middle of the strip. Fold the two resulting flaps in opposite directions.
Making a paper propeller can mean two things: a quick or a more advanced laminated model for scale aircraft. Method 1: The Quick Pinwheel (Spinner) Propellers.7z
Fold the square diagonally from corner to corner both ways to create an "X" crease. If you want something that spins as it