Ravensburger Gravitrax Marble Run and Stem Toy for Age 8 and up an Innovative Construction Set with Endless Building PossibilitiesA bestselling construction activity for boys and girls 8 and up - over 6 million sold worldwide
Includes 122 pieces and 9 ready-to-go track instructions to start creating your own tracks
The ideal Christmas gift for creative, curious kids who love to build
Power the marbles with gravity-based elements in a race to the finish
Customize and experiment with tricks and stunts to keep the marbles rolling faster and further
Experience educational and science play with 24 problem-solving building exercises
