Expansion for the marble run system. Recommended age: 8 years and up. Number of pieces: 45. Made of plastic. Includes many different basic components and 6 marbles to expand the marble run. Playable only with the GraviTrax Starter Set. Includes instructions. The Extension Trax adds more possibilities and fun to the GraviTrax track. Combined with any GraviTrax Starter Set, the Extension Trax brings even more variety and marble fun to the GraviTrax universe. How much longer can the marble roll with the new elements? Ravensburger has been established in children's rooms in Germany and around the world for decades and is the leading provider of puzzles, games, and activity products in Europe, as well as children's and youth books in the German-speaking region. 85% of the products are manufactured in Europe and are sold worldwide from there. The Ravensburger publishing house was founded in 1883. A year later, in 1884, the Ravensburger game publishing company was established. It celebrated its first milestone with the best-selling game "memory." Since 2009, the company has also focused on new technologies with the establishment of its subsidiary Ravensburger Digital GmbH. It connects the classic world of games with intelligent electronics, enabling interactive learning.