Relier Pairs Infant Social DevelopmentVersion en ligne Match the concepts related to social development in infants! par shannie moore 1 Might like to play solitary 2 Will offer their toys to share 3 Be wary of strangers 4 Want to be independent 5 Engage in role play 6 Demonstrate engagement when being fed 7 Start to smile 18 months Newborn 2 years By 1 year By 1 year 2 years 4-6 weeks