Men and boys (at least one a Boy Scout) watch a pinewood derby race. The pinewood derby is a racing event for unpowered, unmanned miniature cars. Pinewood derbies are often run by chapters (packs) of the Cub Scouts program of Boy Scouts of America. With the help of adults, Scouts build their own cars from wood, usually from kits containing a block of pine wood, plastic wheels, and metal axles.