Ravensburger GraviTrax Balls & Spinner Add On Extension Accessory Marble Run Construction Toy For Kids Age 8 Years and Up STEM

As seen on TV - GraviTrax is an innovative marble run and contruction toy for boys and for girls ages 8 years and up. It is an ideal christmas gift or birthday gift for smart, curious kids. Launch more marbles! With the spinner up to six balls can be started at once. Watch as the marbles are sent on a race to the finish through the tracks! Infinitely Expandable - All GraviTrax and GraviTrax PRO products are compatible creating endless possibilities for your tracks. An amazing building toy! Innovative - The GraviTrax interactive track system allows you to design and build your own race tracks and experiment with engineering, gravity, magnetism, and kinetics to propel your ball to the finish. Develops critical skills – Playing and building with GraviTrax builds spatial reasoning and planning skills, and provides a great stealth learning experience. A perfect STEM toy for children. Clear instructions – Comes with clear instructions so that you can start construction and start playing with this fun brain game within minutes., Manufacturer: Ravensburger