Hearts and Minds on Babies (HMB) is an innovative, attachment-based training for Early Head Start (EHS) staff and parents, developed through a collaboration between university-based researchers and clinicians and community-based EHS educators. This article describes HMB, our collaboration, and lessons learned when infusing infant and early childhood mental health principles within professional development training for early childhood educators. The authors explain how to frame attachment needs within the goals of the educational setting, honor culture and diversity, and take time to allow for the development of safe and secure relationships. Stories from a university-based HMB facilitator, an EHS teacher, and an EHS administrator highlight how HMB supports the participants' emotional response as they are learning new ways of being with very young children; a parallel experience related to the needs of the children themselves.