GraviTrax The popular STEM toy for boys and girls ages 8 and up - over 6 million sold worldwideWhat You Get: GraviTrax PRO Vertical Starter Set comes with 153 pieces - everything you need to start building faster, higher, more action-packed marble runs.Build Higher: Use the height tile towers, balconies, walls and high-speed tracks to take your tracks to new heightsInnovative: 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 marbles to the finishClear Instructions: Comes with clear instructions so that you can start building and playing within minutes
