In Rail Racing, you'll drive mini cars similar to Hot Wheels around electric circuits. 

The game features many different trials to let you unlock solo or multiplayer games in five different environments, including a kid's room and a garage. In every race, you have to complete three laps and get on the right track to annihilate the competition, get boosters, and go even faster!

If you want more miniature car racing fun, Rail Racing uses micro-transactions to let you unlock vehicles and get boosts faster.