Handheld gaming devices have come a long way over the years. They have all kinds of fancy bells and whistles these days. The Tomy Digital Derby Auto Raceway is a mechanical game from the late 70s. It is a handheld game with a scrolling film with race car images, a LED light, steering wheel, lap counter, gearshift, and everything you need to play.
The game is not exactly difficult to learn or play but gives you an idea how games used to be a few decades ago.