Students love learning about animals: how animals behave, what animals eat, why some animals are more dangerous than others are, and why animals look the way they do. In this 5E lesson, students investigate why some animals look the way they do--specifically, the advantages of camouflage and mimicry. What are an animal's advantages of being camouflaged? How do animals become camouflaged? As the former driving questions suggest, this lesson is intended for third-to-fifth grade students to investigate camouflage and natural selection. Second, this 3-day (three 50-min class periods) lesson addresses why some animals mimic more dangerous organisms.