In this activity, learners examine body parts (including skin, scales, and skulls) from fish, mammals and reptiles. Questions are provided to help encourage learner investigations. Several activities are described, including object identification (what animal and what part of the animal?), free sorting of the objects, and a discussion of similarities, differences, and protective functions of the animal parts. It's written for use as a cart demo in a museum or aquarium, but could be done anywhere animal body parts are available.