With so many design variables to explore, your students will have a new learning adventure each time they build this high-speed ball roller coaster! The Star Coaster Level 2 guarantees thrilling action rides that include wild rotations, daring loop-the-loops, hairpin turns, and spectacular swivel motions. After each ride, the steel sphere is hoisted back to its starting position by a battery-powered spiral conveyor elevator. A great challenge for beginner STEM or DIY enthusiasts! Level 2 comes with 193 pieces, 2 steel balls, and 10 meters (32.8 ft) of rail. Estimated assembly time is three hours. Suitable for ages 14+. Overall dimensions are 60 x 18 x 36 cm (23.6″ x 7.1″ x 14.2″). Battery not included.