With the GraviTrax PRO Starter Set Vertical, there are no limits to creativity and complex possibilities. Inventive spirit is unleashed, allowing you to dive directly into the endlessly expandable marble run universe. With over 150 pieces and a variety of building blocks, nothing stands in the way of surprising and action-packed building fun. The example tracks and instructions provide a playful introduction to the GraviTrax universe and encourage creativity in building your own tracks. GraviTrax is a flexibly expandable, interactive marble run system for children aged 8 and up: with GraviTrax, children, teenagers, and adults can not only build simple marble runs but also create unique marble run worlds. By freely designing the marble runs and exploring the rolling behavior of the marbles, understanding of science is sharpened, and gravity is experienced up close. The GraviTrax universe includes three exciting lines - CORE, PRO, and POWER. All GraviTrax lines and products can be freely combined. With countless expansions using classic building elements or stones that enable special actions and tricks, the GraviTrax universe can be infinitely expanded. This allows everyone to tinker, experiment, and build beyond their limits.