As part of the public impacts evaluation work conducted for the Explore Science: Earth & Space activity toolkits developed and created through the NASA-funded Space and Earth Informal STEM education (SEISE) project, this summative evaluation study of the toolkits was designed to address and answer questions regarding the number and range of audiences reached by the project, visitor engagement, relevance, science identity, and their understanding around NASA’s Science Mission Directorate (SMD) content areas (astrophysics, planetary science, heliophysics, Earth science). The results are based on