The "Solo-Wheel" is sort-of like the Segway. It balances itself, doesn't need you to pedal and goes up to 12 miles an hour, for about an hour, on a single charge. You just step on and go.
Chen says the "Solo-Wheel" was a hit at last month's toy fair in New York. He says it will be ready for market in two months. They sell for about $1,500.