Pill bugs, also called roly-polies, are small terrestrial isopods that are abundant in temperate areas throughout the world. Because they are engaging, harmless, and easily collected, they provide an excellent opportunity for children to learn about invertebrate body parts, behaviors, and information processing. This column includes activities inspired by children's literature. These activities allow students in grades K-2 and 3-5 to experience the "Next Generation Science Standards" ("NGSS") science and engineering practice of Designing Solutions, while addressing the crosscutting concept of Structure and Function.