Get ready for racing fun with the GraviTrax Starter Set! What you get – GraviTrax is an innovative marble run and stem toy for boys and girls made with high-quality components, designed for ages 8 and up. It comes with 122 pieces and is an ideal holiday or birthday gift for smart, curious kids aged 8 and up. Innovative – the GraviTrax interactive track system allows you to design and build your own race tracks and experiment with gravity, magnetism, and kinetics to propel your ball to the finish. Clear instructions – comes with clear instructions so that you can start building and playing within minutes. Develops critical skills – playing and building with GraviTrax builds spatial reasoning and planning skills, and provides a great stealth learning experience. With the GraviTrax interactive track system and marble run, you can design and build your own race tracks and experiment with gravity, magnetism, and kinetics to propel your ball to the finish. With a variety of tiles, levels, tracks and features, you can control the speed of each ball. The open-ended building concept offers endless possibilities to design a different track every time you play. Add flair and speed to your tracks with expansion sets and action accessories. GraviTrax is a fun STEM toy for boys and girls that comes 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. Discover how the laws of physics affect the track your ball takes with curves, crosses, freefalls and even a cannon. Experiment using different heights and angles to control the speed of the ball. The included tasks and construction plans introduce you to the world of GraviTrax. Or let your creativity take over and begin constructing your own track designs from scratch.