Downhill Racer - S5.E7

George loves cars And when he hears about the annual Soap Box Derby race in the country, he and Allie decide to enter. But first, they need to build a car, and the rules say no help is allowed. So they look at a book that shows them the parts they need to build a soap box derby racer and find out just what is needed to make one go downhill, and stop.