Concept designs often don't make good production vehicles. The more exciting ones tend to ignore regulations and convenience, favoring low-slung, flowing body lines that would be hell to mass-produce.

This video is no longer available. Long before the popularity of car racing video games, the slot car craze in the 1960s and ’70s had young people and their parents obsessed with racing scale models.

When he was 14, Ed Shorer loved nothing as much as slot car racing. All his free time and spare change were spent at the track, where he and his buddies, gripping hand-held electric controllers, raced ...