This Sedimentary Collection includes a set of 10 specimens enclosed in a handy, plastic storage container. The included rock identification chart, complete with images and a brief description will help kids better understand how sedimentary rocks were created. A perfect starter set for the young budding geologist! Specimens are 1" x 1 1/4" (Actual dimensions: 8x4.68x1, 1 lb) Grades 3+, Ages 8+. Geology is a required STEM subject.