Formula&reg; SpaceRail DIY Physics Space Ball Rollercoaster with Powered Elevator (5000mm Rail)-level-1 Brand New SpaceRail DIY Physics Space Ball Rollercoaster with Powered Elevator,Fun DIY physics toy 5,000mm rails included,Steel space balls, Endless rail design possibilities, Elevator powered by 1*14G/R14 battery(not included) Create yourself rollercoster like rails with 360-degree flip overs, steep drop and climbs, sharp high-G turns, etc Control speed, angle, timing by arranging your own railway Learn physics hands on