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BEST IN ITS CLASS Take your rock tumbling seriously with this top-of-the-line rock tumbler from National Geographic. This set has all the features and accessories you’ll need to master rock tumbling, start an extraordinary rock collection, and create beautiful homemade jewelry. Contents and Features: • Power saving automatic shutoff timer • Reliable, long-lasting motor • Leak-proof • Noise reduced operation • Plenty of stones (1 lb) and four levels of grit • Jewelry fastenings so you can create your own unique jewelry Rock tumbling is a fun activity for children of all ages and promotes a healthy interest geology and science. Introduce your kid to science the fun way, and join National Geographic as we inspire future generations. National Geographic Toys is proud to provide a 100% satisfaction guarantee 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 world’s largest nonprofit scientific and educational organizations. National Geographic’s net proceeds support vital exploration, conservation, research, and education programs.