TrackMaster Bust Through Mine Tunnel Engine Powered Destination.
Now you can add motorized action to your TrackMaster layouts with these action destinations. Each destination comes with a destination powered by the included motorized engine.  Bust Through Tunnel destination features a tunnel exit which has been barricaded by fallen rocks and the only way the engine can proceed is the child must press the TNT plunger to blow the spring loaded rock barricade out of the way.  Once the rocks are blown out, the engine can chug along safely.  Perfect for expanding your TrackMaster world.