This MATIK [Science, Technology, Engineering and Mathematics] system is ideal for teaching children about gravity, magnetism, kinetic energy. Freestyle your own track design or use the included tasks and blueprints to help you get started in the world of GraviTrax! With the GraviTrax Element Zipline for the Ravensburger marble run system, long distances can be covered and different parts of the run can be spectacularly linked. A rolling ball triggers the slide. The sledge glides playfully to the finish line of the zipline and launches a new ball there. Large differences in height are no obstacle for the zipline! The new bracket system enables an even more stable transport of the sled - for even more GraviTrax action. GraviTrax is a flexibly expandable, interactive marble run system for children from the age of 8: With GraviTrax, children, young people and adults don't just build simple marble runs. They create unique ball track worlds. By freely designing the ball tracks and exploring the rolling behavior of the balls, the understanding of science is sharpened and gravity can be experienced up close. The GraviTrax universe includes three exciting lines - CORE, PRO and POWER. All GraviTrax lines and products can be freely combined with each other. The GraviTrax universe can be infinitely expanded through countless extensions with classic building blocks or stones that enable special action and tricks. In this way, everyone can tinker individually, try things out and surpass themselves. The toy box contains: 4x building blocks, 2x U-shaped support post, 2x base block, sliding wheel, sliding lever, 2x sliding beam attachment, 2x sliding beam and instructions.