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