Miniature Turbine

This is a miniature turbine that spins when air or a liquid fluid is blasted into the blades at an angle. You can slide it on the shaft of a small screwdriver or something similar. It can reach incredible speeds when blown with enough air. The shaft can melt if spun for too long at sustained speeds as it does not have a metal sleeve. It cannot be used to generate thrust due to the geometry of the blades.