The Ravensburger GraviTrax Junior Starter Set Ocean offers children aged 3 and over a child-friendly introduction to the world of marble runs. With 58 components, a custom underwater world can be created. The elements feature lovingly designed sea creatures such as octopuses, crabs, and fish, as well as colored track elements. This starter set is made from bio-based materials and playfully promotes an understanding of gravity as well as motor skills. The large, easy-to-grip components can be easily put together by children's hands and allow for flexible track layouts for exciting first marble races.