A whirligig is an object that spins or whirls, or has at least one member that spins or whirls. Whirligigs are also known as pinwheels, buzzers, comic weathervanes, gee-haws, spinners, whirlygigs; whirlijig; whirlyjig; whirlybird; or plain whirly. Whirligigs are most commonly powered by the wind, but can be hand or friction powered, or even powered by a motor. They can be used as a kinetic garden ornament. They can be designed to transmit sound and vibration into the ground to repel burrowing rodents in yards, gardens, and backyards. Reference wikipedia