AbstractAgency is a central value within museums and science centers, but it has not been defined and operationalized in ways that can guide museum practice or support inclusion for new audiences. In this project, an interdepartmental group of science center staff co‐created a conceptual framework for noticing and supporting visitors' agency. The framework includes four interconnected aspects of agency: physical environment, social engagement, choice and autonomy, and relevance and empowerment. Conceptualizing agency as multifaceted led to more expansive approaches for supporting it, allowing staff to move beyond open‐endedness to consider a wider range of supports and structures that can make museum experiences more inviting and inclusive. The framework informed the development of practical tools for use by exhibit/program developers and facilitators. Tools are freely available and guide museum staff in questioning current practices and integrating the four facets of agency into planning, prototyping, and observation of interactive experiences.