Outreach activities at the interface of science and art present a unique opportunity to connect and engage with “latently interested” publics who do not otherwise take part in science activities like visiting science museums. In this paper, the authors present “Guerilla Science” as one model that supports the hypothesis that well-designed science + art (STEAM) programming in informal settings can broaden participation in, and facilitate engagement with STEM-related topics. This paper describes a range of interactive events featuring scientists and artists and accompanying research into the