Thank you Clive. I looked up on dictionary before posting my question.
Under section of social development was this question "Does your child demonstrate reciprocity?" . I'm not sure if this question means "Does your child has interest in playing with other kids?" or not?
Not really. It means Does your child co-operate with others? Does your child treat other children the way he or she herself wants to be treated? Can your child give and take equally well?