Engaging fourth-grade students in hands-on science was easy when a container of mealworms arrived the second week of school. The author's naturally curious students immediately began asking questions, and soon they were eagerly investigating animal characteristics and behavior. But, the journey did not stop there. After students tested mealworms senses, locomotion, color preferences, and ability to move on different textured surfaces, the author introduced a different organism--snails--and gave students less specific instructions so they could design their own investigations. This 10-day study, which is described in this article, not only allowed students to examine and compare living creatures but also spurred them to further scientific investigation and discovery.