GO Flexible is designed for beginners to get to know GraviTrax – just unpack and get started. It is compatible with all GraviTrax products. GraviTrax GO includes everything needed for a simple and straightforward introduction to the GraviTrax universe. Thanks to the included instructions and additional tasks, it playfully introduces creative building. This way, users can explore the endless possibilities of GraviTrax with plenty of fun and action. The included action elements also inspire new ideas and creative tracks. GraviTrax is a flexibly expandable, interactive marble run system for children aged 8 and up: with GraviTrax, children, teenagers, and adults can build not just simple marble runs, but 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. Warning: Caution. Not suitable for children under 36 months. Small marble(s). Choking hazard.