similar to pinewood derby/cub cars homemade wooden cars are raced down a track
car kits to make in advance, a track, electronic scales to weigh, race score sheets and certificates/prizes for winners
You need a track for the race google KubKar track or pinewood derby. You may be able to borrow one or make your own. They are expensive to buy. Kits should be sold to scouts several weeks in advance (or make them in meetings) Kits can be obtained from Boy Scouts of America, scouts Canada or from manufacturers. On the night they bring their completed cars. These are judged for design, weighed etc You run a series of races..