The pinewood derby is one of the most popular and successful family activities in Cub Scouting. Pinewood derby cars are small wooden models that Cub Scouts make with help from their families. Then they race the cars in competition. The cars are powered by gravity and run down a track. Most packs have a pinewood derby every year. It can be run indoors or outdoors. Every Scout can design and build their own “grand prix” car to enter in the race.