The Action Set Twist includes everything needed to build custom tracks full of marble action. Unlimited fun thanks to endless possibilities. With the GraviTrax Action Set Twist, diverse and unique tracks can be created. The included action elements provide endless building enjoyment: The spiral allows marbles to overcome height differences at high speed, can be assembled to different heights, and perfectly adapts to any track. The trampoline adds new momentum and energy: it's a game with gravity. How high and far can the marbles jump? GraviTrax is a flexibly expandable, interactive marble track system for children aged 8 and up: With GraviTrax, children, teenagers, and adults can create not just simple marble tracks but unique marble track worlds. By freely designing the marble tracks 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 extensions 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.