Common Interest set of prepared slides is perfect for young children and students interested in learning about the building blocks of science and nature through the lens of a microscope (sold separately) Each slide is clearly labeled for easier identification of the specimen it contains Specimens are sealed behind a cover slip made from high-quality optical glass Included slotted slide case makes it easy to safely store and organize the slides Set of 20 slides includes the following specimens: Letter “e” (w.m.), Fibers Slide (cotton, linen and hemp), Sheep Hair, Cat Hair, Honey Bee Compound Eye, Cicada Wing, Locust Wing, Honey Bee Leg, Butterfly Wing, Bee Abdomen, Dragonfly Wing, Butterfly Leg, Butterfly Antenna, Worker Bee Wing, Butterfly Scale, Bee Antenna, Pine Tree Pollen, Fern Spore, Camellia Leaf Section, and Monocotyledonous Stem of Corn