Ah, the sweet memory of learning to ride a bike with training wheels! My hands are sweaty, and my ego a bit damaged after spending a half-hour learning to ride a battery-powered unicycle called the Pinwheel. This $295 gadget is one of the more interesting finds here at Computex 2014 — if youve been looking to ditch that Segway for a more portable mode of transport, this may be it. Its made by Shenzhen-based company TOPJOY, and it really is a thrill to ride.