Meet the Pinwheel: a battery powered unicycle that provides you with a more compact mode of transport. Designed by TOPJOY, this unicycle can go as fast as 22 km/h. As Engadget has reported, you will probably need some training to get this to work. The device weighs 20 lbs and has a replaceable battery pack. It even has a USB port to charge your gadgets. You won’t be able to buy this here though.