The GraviTrax Action Set XXL Skytrax opens up possibilities and spectacular building fun with exciting functions and a huge selection of building elements. With the GraviTrax Action Set XXL Skytrax, you can experience creative building fun like never before. The innovative Skytrax bricks offer exciting functions: Let the balls fall through the bricks, catch them and connect them to form bridges. The slides allow the ball to whizz around the majestic towers with momentum and speed. This extensive set full of exciting elements is ideal for adventurers who want to create a tricky marble run full of possibilities. GraviTrax is a flexibly expandable, interactive marble run system for children aged 8 and over: With GraviTrax, children, teenagers and adults don't just build simple marble runs, they create unique marble run worlds. Through free design and exploring the rolling behaviour of the balls, children's understanding of science is sharpened and gravity is brought to life.