SmartivityRoller Coaster Marble Slide Science Kit Age: 8+ DIY Time: 60 Minutes Play Time: Unlimited Skills Developed: Analytical Skills, Creativity, Motor Skills, Practical Skills Smartivity have mashed-up a marble run and a pool table to design the Smartivity Roller Coaster Marble Slide S.T.E.M. Educational D.I.Y. Toy kit. This project is based on the fundamentals of gravity, centrifugal force and banking. The kit contains all the elements needed to assemble the Roller Coaster Marble Slide.A mix of slider game and pool table, this project is loads of fun to build and play. Once built, a kid can raise marbles along the wheel, and release them. As the marble slides down the track, they can aim the marble with the help of levers on the two sides. On the marble-pool part of the game, kids can place marbles, in such a way that the striker marble coming from the slide track hits them and the strike sends them in the corner or side pockets.{source: Internet} !! Shipped directly from India !!