Tricycle or bicycle? Well, it all depends

An industrial design professor and two students at Purdue University created the bike, called Shift. Their design topped 853 entrants from 56 countries to win the $15,000 first prize in the 9th International Bicycle Design Conference in Taiwan. The 16-in.-wheel bicycle looks like a tricycle, but as the bike gains momentum and the child learns to balance, the two rear wheels shift inward to make one wheel, transferring balance from the bike to the child.