friends at seven

my son has a couple of friends that he plays with at home but when he is at school they don't play with him and don't seem to be his friend.  I was just wondering how kids play and what kind of level do friendships mean to them at the age of seven.

[Kevin Kennedy, Ph.D.]

By the age of seven, most children can identify peers with whom they have a friendship. But the context is important. That is, it is not unusual for children to have friends at school with whom they might have a 'stronger' bond than they have with children they might know from a different context (e.g., neighborhood, YMCA, church). Encourage your son to gravitate at school to the people he identifies as friends there.