The Fly Gyro is a glider plane which has a built in Gyro Wheel. When the Gyro Wheel is spun it provides stability for a longer flight. The underlying physics at work is gyroscopic precession is cool and basically allows for young boys and girls to just spin the wheel and throw the glider for a fun flight. The material is all made of a stiff foam material light for easy throwing, yet durable and safe for young throwers. This large version has a wingspan from wing tip to tip of 10.5 inches, and a front wheel to back wing length of 7 inches.