An electronic-free, modular, interactive track system where parents can build and design a customized marble run. This STEM toy ideal for little boys and girls aged 8 and above. It will allow your kid to experiment with magnetism, gravity and?kinetics. With over 100 pieces and 18 different construction elements, the GraviTrax Starter Set offers everything you need to begin building your own action-packed track systems. Help your kiddo discover the laws of physics and how it impacts our life. The marble takes with curves, junctions, freefalls and even a magnetic cannon. Experiment with different play options, including racing, creating the longest track or executing trick shots. Gender: unisex.