Explore the wonders of geology with the Smithsonian Rock and Gem Dig Kit. This educational toy features a variety of multicolored gemstones for kids to discover. Perfect for young explorers eager to learn about minerals and geology. New in box. Excavate Gemstones and Minerals Identify Gemstones and Minerals Learn how Rocks and Minerals are formed S.T.E.M- Science, Technology, Engineering, and Math Age 8 and Up