It's a race of laughter, false starts and wild bottle waving: New York's Diaper Derby sees 30 infants battle it out for glory in a three-meter crawling contest. There is only one real rule: trying to stumble to your feet is **t allowed. From the sidelines parents will on their progeny with bottles of milk, television remote controls or key jangling. There is ** stopwatch, and the time it takes these cherubic racers to power down the 10-foot mat ...