How does the ball get from start to finish when, for example, only 4 height stones, 3 curves and 2 rails are available to build the railway? 30 task cards show the start and finish point of the track to be built. If at the end the ball rolls from start to finish and all parts are used, the puzzle is solved. Hexagonal base plates, which can be variably placed next to each other, enable tricky and varied puzzle fun with the interactive marble run system. This STEM system [Science, Technology, Engineering and Maths] is an ideal one to teach kids about gravity, magnetism, kinetic energy and fun. Hit a snag? Freestyle with your own track design or use the tasks and blueprints included to help you to get started in the world of GraviTrax! Are the gravity spheres stopping or flying off before reaching the end target? Time for some problem solving. Rebuild and try something different! The GraviTrax track system can be extended indefinitely with extra track packs and add-on’s – each sold separately. This set is suitable for 1+ players, ages 8 years and up. Fully complies with all necessary UK and EU testing standards. Includes 1x instruction and solution booklet, 30x task cards, 3x hexagonal floor tiles, 1x starting stone, 1 xball, 1x action stone hammer, 4x height stones large, 7x curves, 1x crossing, 2x plastic rails long, 2x plastic rails medium, 3x plastic rails short, 1x base stone, Wagers for the base stone: 1x finish