Modern zoological gardens have invested substantial resources in technology to deliver environmental education concepts to visitors. Investment in these media reflects a currently unsubstantiated belief that visitors will both use and learn from these media alongside more traditional and less costly displays. This paper proposes a model that identifies key factors theorized to influence the likelihood of visitors engaging in technology-delivered media. Using data from two case studies of large National Science Foundation-funded projects in zoos, the authors argue key factors in predicting