It was a disc-shaped glider which was generally plastic and 20-25 cm in diameter with a lip. The shape of the disc was an airfoil cross-section that allows it to fly by generating lift as it moves through the air while rotating after being thrown. The Frisbee was originaly manufactured by the Wham-O Corporation, and was then known by several early names like Whirlo-way and Pluto-Plater.
On the planet Grayson, they became very popular among school children after being introduced by Steadholder Harrington, to the point that the Protector observed that it was dangerous to walk through Austin Central Park after school. (HH9)
- Detailed article about the frisbee on Wikipedia