3B Scientific marble rollercoaster kit is used to build understanding of physics, including gravitational force, and includes a motorized elevator for automatic circulation of the marbles around the coaster. The kit has 500.0mm of rail, hairpin corners, and a loop-the-loop for creating the track, and includes two steel balls for demonstration purposes. The kit has metal construction for durability, and requires a large, flat surface for assembly. The kit requires a C 1.5V battery to power the elevator (battery not included), and is suitable for age 14 and older.3B Scientific manufactures anatomical models, simulators, charts, and other training materials for use in scientific, medical, and patient education. The company, founded in 1948 and headquartered in Hamburg, Germany, meets International Organization of Standardization (ISO) standard 9001: 2008.What’s in the Box?(3) bases(3) shafts (300.0mm)(1) rail (500.0mm)(5) arms(5) arm holders-A(5) arm holders-B(5) arm sheaths(10) arm wrenches(29) rail stands(1) gear box(1) fork part(12) elevator helix(3) elevator rings(1) elevator cover(3) elevator stands(3) corners-Part A(3) corners-Part B(6) corner stands(1) loop(1) loop stand(2) base holders-big(2) base holders-small(1) gear box stand(2) steel balls(2) rail jointsInstructions