This poster was presented at the 2016 Advancing Informal STEM Learning (AISL) PI Meeting held in Bethesda, MD on February 29-March 2. The Expanding Repertoires project is a collaboration between the Center of Science and Industry (COSI) and The Ohio State University (OSU) to begin the systematic study of science and children's museum programs and practice for preschool dual language learners (DLLs), their families, and the community organizations and early childhood professionals who serve them.