You wouldn& think that a four-wheeled car would go faster if one of its wheels didn& touch the ground. Or if its axles were bent. Or if it was designed to grind against a wall. But you& be wrong, and here& the science to prove it.
DIY Pinewood Derby Awards - What other events need an award?
New custom printable certificates for Pinewood Derby, Powder Puff Derby.any Derby. Style Awards, Places, and Pit Passes. Linked site also has free participation award certificates.