I put together an “adult” pinewood derby this past March to raise money for Spina Bifida. The event was hosted at a local bar/lounge during happy hour and the track was placed right on top of the bar to make for easing viewing. There was no rules to the designs except that it could not exceed the length or width of a standard derby kit car and the cars could not be propelled by anything explosive.The cars people came with were great and some weighed a few pounds and one was powered by 12v computer fan. Despite all the designs the winner was a vintage car that a participant designed when he was in scouts in the 70’s. Go figure.