Part of the Explore with Me Geology® series, these tumbled treasures contain 24 polished specimens (6 each of Rocks, Minerals, Quartz, Agate) enclosed in a handy, plastic storage container. A rock identification chart, complete with images, is included to help kids categorize their collection. A perfect starter set for the young budding geologist! Ages 8+, Grades 3+. Geology is a required STEM subject.