AP - Fri Apr 29, 2:33 PM ET This undated illustration provided by Purdue News Service shows the 16-inch-wheel bicycle, designed by Scott S. Shim, assistant professor of visual and performing arts at Purdue University. The new bicycle design created at Purdue University could erase the need for parents to hold on to the back of a two-wheel bicycle as their child learns how to ride. The bike, called SHIFT, was created by Shim and two students. Their design topped 853 entrants from 56 countries to win the $15,000 first prize in the 9th International Bicycle Design Competition in...