3 years & up. Inspire crafts and scientific discovery with this Natural Stones and Minerals kit! This rock collection box includes more than 210 individual pieces and 11 different types: River Pebbles, Polished Stones (black, white, assorted), Tiger's Eye, Gemstones, Amethyst Points, Amethyst Clusters, Iron Pyrite, 2 Agate slices (large and small). An ideal addition to sensory bin, little geologists will love to sort, classify and identify the various stone characteristics! Use this kit to start a rock collection and inspire kids to get out and find even more stones. This teaching aid assist with geological lessons and nurture a love of nature. These varying rocks and gems also make wonderful vase fillers and jewelry makers.