Great way to start a rock collection! Learn about the exciting hobby of rock tumbling with National Geographic. This set includes all the accessories youll need to start polishing dazzling gems. Rock tumbling is tonnes of fun and a great way to start an extraordinary rock collection. Kids can use the included jewellery fastening to create beautiful homemade jewellery! Introduce your kid to science the fun way! National Geographic Toys is proud to provide a with all our products so that you can buy with confidence. About the National Geographic Society With a mission to inspire people to care about the planet, the 126-year-old National Geographic Society is one of the worlds largest nonprofit scientific and educational organisations. National Geographics net proceeds support vital exploration, conservation, research, and education programmes.