Kids and their families participated in the 11th annual Sertoma Mile High Soap Box Derby over the weekend in Aurora, Colorado. /CFP Photo

The small, engine-less cars are made of plastic, wood, metal and wire, with gravity taking them downhill to compete. /CFP Photo

The Super Kids division was introduced in 2008 to the racing to accommodate children with challenges, which allows them to have a co-pilot. /CFP Photo

Peter Starz, 16, right, who has Down syndrome, makes a run with Alonzo Campos, 10. /CFP Photo