SpaceRail NO. 231-5 Take on five different track routes, with the new direction alternator directing traffic! Experience thrilling see-saw drops, loops, twists and stunts, plus all-new swinging arm section. Includes attachable battery-powered elevator to keep the action flowing for hour after hour. The intricate and expansive SpaceRail labyrinth in our range; recommended for advanced users. A 12-14 hour assembly time provides the ultimate DIY construction challenge!