In this animal behavior laboratory, designed to promote a discovery-based approach to laboratory teaching, students first observe the study organism, which gives them the opportunity to decide what behaviors interest them. They work collaboratively to develop their own hypotheses, which can range from simple to complex depending on the course's level. Student groups then design and run experiments to test their hypotheses. At the end of the exercise, the groups present their results to their peers, who are given time to ask questions. This kind of flexible, student-led exercise develops students' reasoning skills and ability to think creatively.