This article focuses on the efforts of the Collaborative for Early Science Learning (CESL), a group of six museums led by the Sciencenter in Ithaca, New York, that partner with their local Head Start programs to provide training for teachers and opportunities for family engagement. These efforts address the gap between children’s readiness to explore science through everyday experiences and adults’ support. CESL believes that hands-on professional development (PD) opportunities for teachers and families can reduce adult discomfort with facilitating science programming and increase their