The Boo is a fun, eco-friendly design that allows users to play while charging up old batteries.
Designed as a boomerang, The Boo can hold three AAA batteries and charges them as the boomerang gets thrown back and forth. The Boo turns the rotary motion into electric energy.
The outside of the self-charging system is made from silicone to help protect against hard falls. The center of The Boo has a small display to indicate charge levels.