By Derby rules the combined weight of racer and driver is limited. Because gravity is what drives soapbox cars and weight combats air resistance, competitors want to weigh in with their cars as ...

Brenna Kilby, 12, has been racing soap box derby cars seriously for a little less than a year and she's already one of the fastest in the nation. Brenna Kilby, 12, has been racing soap box derby ...

The derby will feature two race sessions ... opportunity for competitors to design and race their handmade soap box cars down College Hill. For those interested in racing, registration is now ...

Black and white photograph of the basic structure of Tongue-tied San Francisco Museum of Modern Art Artists' Soap Box Derby car created by Eleanor Dickinson.