Glue multiple strips of colored paper (like brown or tan) together using super glue to create a thick "block".
This is the fastest way to make a propeller that spins when you blow on it or run with it. Propellers.7z
Are you looking to attach this to a , or just making a standalone toy? Paper Crafts : How to Make a Paper Propeller Glue multiple strips of colored paper (like brown
Cut along each crease from the corner toward the center, but stop about an inch before you hit the middle. Paper Crafts : How to Make a Paper
Fold the square diagonally from corner to corner both ways to create an "X" crease.
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.
For hobbyists making scale planes, you can "laminate" paper to act like wood.