Experience the power of gravity with the amazing GraviTrax. GraviTrax is the awesome STEM track building toy from Ravensburger. Design, engineer and build incredible tracks and set your spheres rolling! Take your track building to new heights with this add-on lift pack. Overcome the power of gravity and raise your spheres up as you elevate your track to new levels. See how many marbles you can raise to the top. Whether you freestyle your own tracks or follow the blueprints included, prepare to have tonnes of fun as you experience the scientific wonder of gravity, magnetism, and kinetic energy in front of your very eyes. For ages 8 and over.