In this article, the authors investigated how the informal science education (ISE) innovations in the elementary teacher education program affected the participants as they began their professional lives as classroom teachers of science. The authors found that the two participants referenced as important the ISE experiences in their development of classroom science identities that included resilience, excitement and engagement in science teaching and learning–qualities that are emphasized in ISE contexts. Specifically, the affective benefits derived from the infusion of ISE contributed to developing how they came to see and enact reform-oriented science teaching practices.