Volkwagen's Fun Theory experiments have been all about proving that people will do the right thing if you make the right thing fun to do. For instance, people threw recyclables into a bin just to hear the noise it made. The latest hijinks come courtesy of Kevin Richardson, an American whose idea was selected for the next Fun Theory experiment.This time, the challenge was to make driving the speed limit rewarding, and Richardson's idea was a speed camera lottery. Although it doesn't sound the least bit compelling, his idea worked. We won't spoil the surprise here, so follow the jump to see it in action.[Source: YouTube