The GraviTrax The Game Challenge Curves logic game by Ravensburger combines the fun of a marble run with tricky brainteasers. The set contains 30 challenge cards in various difficulty levels that put logical thinking to the test. The goal is to cleverly guide a marble to the finish line using 8 special curve tiles and 4 hexagonal base plates. The modular system playfully promotes an understanding of physical laws such as gravity as well as fundamental STEM principles. It is ideally suited as a creative activity for all marble run fans looking for a new challenge.