Add a surprise to your numbers by sending up to three balls into the Gravitrax Pro Vertical Mixer and see which sides they come out of! Mix the balls' journey with the mixer. Add a surprise to your numbers by sending up to three balls into the mixer and see which sides they come out of. Combine this accessory with the GraviTrax Pro Starter Set. This set includes 1x Mixer Base This STEM [Science, Technology, Engineering and Maths] system is ideal for teaching children about gravity, magnetism, kinetic energy and fun. hit a snag? Freestyle with your own track design, or use the included tasks and blueprints to help you get started in the world of GraviTrax! Do the gravity spheres stop or fly away before reaching the final destination? Time for some problem solving. Rebuild and try something else! Product info: Contents: 1x Mixer Base Suitable for ages 8 and up. The GraviTrax track system can be expanded indefinitely with additional track packs and add-ons - each sold separately.
