Sky Props go by many names such as: Helicopter, Sky Prop, Aero Prop, Puddle Jumper, and a slew of other names. Basically, it's a small propeller and a stem. You spin it by rolling the stem between your hands. The faster you do it, the higher it goes. With a little practice, you can even do it upside down with the stem facing up. Each Sky Prop comes in a random color and is 8 inches wide and about 7 1/2 inches tall.