Pinewood Derby Car Help

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For fun racing any shape will do but to win keep its enter profile as low as possible and give its nose and tail the "cutting edge" to cut down on air resistance. Lightly sand the wheels with fine sand paper were they contact the track to make sure their smooth by removing any tiny bumps of plastic and to make them as perfectly round as possible. If the wheels have a tiny raised ridge run around their center try not to remove it, just the bumps. The ridge of plastic around the center portion of the wheel will allow for small contact point between the track and wheel hence less friction between the wheel and the track and faster speeds. And by all means, Graphite on the axles. Once your finished shaping, sanding, and painting and have attached it axes and wheel weigh it. If it weighs in light, drill a hole or two in its botton as close to the center line as possible and use lead to bring it back to proper weight. The smoother the entire unit is the fast she scoots! Have a ball! Their great fun! Altho' its a few years out, I cant wait until my grandson's are ready to race em..
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