These social skills help them to form strong relationships with peers in the future. (child-encyclopedia.com)
At a basic level, maternal mental health was significantly associated with children's emotional well - being, cognitive development, behaviour and their social relationships with peers at 46 months. (gov.scot)
At some point, a child would benefit more from interacting with peers in small groups as well as with a caregiver / teacher. (skepticalob.com)