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?
DIY Pinewood derby trophies are simple to make yourself and they would be a great den project for any metal requirement.