At the same time young babies are developing an understanding of self as separate from others--what it means to be "me"--many also face having to negotiate living, learning, growing, and developing as part of a group--what it means to be "we". This is true for more than half of all infants in the United States under the age of 9 months, who now spend many or most of their waking hours in some type of group care outside the home. This article discusses how to encourage prosocial babies in group settings. It features three classrooms where teachers encourage and support prosocial behaviors in babies and allow strong positive social emotional development to occur in infants and toddlers and prosocial skills to flourish. In the case of these three classrooms, it is evident that infants and toddlers are indeed up to the challenge of grappling with understanding the difficult lessons of becoming "we" and "me" at the same time. This article also provides the authors' definition of babies' prosocial behaviors and shows how young babies have a remarkable capacity for prosocial behavior, an ability greatly underestimated by traditional child development theorists.