Trackless indoor trains are a popular design, suitable for indoor shopping malls, indoor playgrounds, and even outdoor use. They typically feature a front locomotive with a driver, and four or five rear carriages for both adults and children. The carriages and fronts can be mixed and matched, with animal models like unicorns, ducks, tigers, rabbits, cows, Pikachu, astronauts, airplanes, and horse-drawn carriages.



