The larval stage of a northern casemaker caddisfly provides a creative hands-on activity for students while also introducing them to aquatic insect development and adaptations to stream life. This project is an opportunity to study the role of this invertebrate in the food web of a stream. Using cardboard tubes to fashion a case for a generic northern casemaker caddisfly (Limnephilidae), students are introduced to the life cycle of an aquatic insect and adaptations to an aquatic existence, including gills and camouflage.