Ravensburger GraviTrax Starter Set Interactive Gravity Marble Run STEM Toy

[GraviTrax: Starter Set] Build action-packed track systems for hours of fascinating fun with the versatile “GraviTrax Starter-Set”! This set includes 122 pieces to help build your Marble run. [INNOVATIVE] The GraviTrax interactive track system allows you to design and build your own race tracks and experiment with gravity, magnetism, kinetics [STEM TOY] Boys and girls ages 8 and up can experience educational and science play. [COMPATIBLE] Easily extend play time - All sets are compatible and functional with all GraviTrax systems [GREAT GIFT] GraviTrax is an a ideal holiday and birthday gift for creative, curious kids and adults who love to build.