GeoTrax is a vehicle track system that is a world of transportation fueled by imagination. The new Tunnel is an extension to the new GeoMotion statement. With an RC Engine, you can activate the great GeoMotion feature - just drive an engine through the tunnel and watch as the water wheel begins to spin and great train & water sound effects are activated! In addition, this tunnel can be setup in so many ways because of the flexible fabric sections. Kids can use it over curved track or straight track, or a combination of both, and the side portions even detach so they can be used separately anywhere around the set. Kids can also play with the tunnel without GeoMotion; just push the vehicles through, lift and lower the gates and push the water wheel round and round! The set comes with the main mountain portion plus 2 extended fabric tunnel sections. Everything in the system works together, so kids can bring this set to the GeoTrax sets they already have and create an even bigger train world.