The GraviTrax PRO starter set vertical gives free rein to creativity and new, more complex options.The GraviTrax PRO starter set vertical unleashes the spirit of invention and can be plunged directly into the endlessly extendable ball-track universe. With over 150 parts and the versatile components nothing stands in the way of the surprising and action-packed construction fun. The sample tracks and instructions allow you to get started in the GraviTrax universe in a playful way and encourage creativity to build your own tracks. GraviTrax is a flexible, interactive ball track system for children aged 8 and over: With GraviTrax, children, young people and adults are not only building simple ball tracks. You create unique ball track worlds. By freely designing the ball tracks and exploring the rolling behavior of the balls, the understanding of science is strengthened and gravity can be experienced at first hand. The GraviTrax Universum contains three exciting lines - CORE, PRO and Power.