The Ravensburger GraviTrax Starter Set is a plastic construction toy featuring 124 pieces for creating marble runs. With a theme focusing on construction and STEM, this set is designed for ages 8 and up. The Gravitrax character family is showcased, making it a perfect addition to any construction toy collection. The set includes Construction Spheres Science Tracks Games, providing hours of entertainment for children and adults alike. Made by Ravensburger. Brand New in box. Thanks for looking.