Kit includes 30 large sterilized and individually foil-wrapped Barn Owl Pellets and 8 posters, each measuring 23 x 17-1/2 inches: Bone Sorting Chart, Food Web, Vole, Mole, Shrew, Bird, Pellet Formation, and Human/Vole comparison. Also includes an illustrated Instructor guide containing background information, suggested teaching strategies, dichotomous skull key, projects, and reference material. The 15 Bone Sorting Charts measuring 8-1/2 x 11 inches make great student worksheets.