This summative evaluation study examines visitors' experiences of the "Plastics Unwrapped" exhibit at the Burke Museum of Natural History, Seattle, WA. The exhibit explores the complicated legacy of plastic, and the ways in which it has improved life, but not without serious impact on people and the environment. Within a framework of four evaluation questions, this study used multiple methods to assess what visitors do and where they spend their time in the exhibit, what knowledge they take away, and whether the exhibit impacts visitors' attitude toward plastic and their perception of the