Ravensburger GraviTrax PRO Vertical Expansion Set - Marble Run and STEM Toy for Boys and Girls Age 8 and Up - Expansion for 2019 Toy of The Year Finalist GraviTrax , Gray
- GRAVITRAX: The popular STEM toy for boys and girls ages 8 and up - over 6 million sold worldwide.
- WHAT YOU GET: GraviTrax PRO Vertical Expansion Set comes with 33 pieces - includes height stone towers, balconies, and walls to expand your marble run creations.
- BUILD HIGHER: Use the height tile towers, balconies, walls and high-speed tracks to take your tracks to new heights.
- 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 marbles to the finish.
- CLEAR INSTRUCTIONS: Comes with clear instructions so that you can start building and playing within minutes.