This Rocks & Minerals Collection includes a set of 24 specimens (6 each of Metamorphic, Sedimentary, Igneous, and Minerals) 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! (Actual dimensions: 6.25x4.75x.63; .32 lbs) Grades 3+, Ages 8+. Geology is a required STEM subject.