Each sorting kit includes one pound of assorted fossils with a sorting guide. The fossil mix includes 7 different types of fossils including: shark teeth, crinoid stems, clams, hemiaster echinoids, sea snails, gastropods, and brachiopods. The sorting guide includes drawings and information about each type of fossil. This kit includes fossils approximately 300+ million years old! Each kit will include at least a couple of every type of fossil mentioned! One pound of fossil mix is approximately 50-90 fossils! This is a great way to introduce students to ancient organisms. The identification guide was specifically designed to be informative and educative.