Some young people have a knack for getting along with others. They step into a group and within minutes, they are accepted into the group. Some really never get along with others. Perhaps the easiest way of explaining how your child can learn to get along with other children is to place him with a cat.
A child who is good at interpreting nonverbal communication will know after some interaction with the cat. What the cat likes and dislikes and how it wants to be approached. This is especially important as your child will meet more and more people as he grows older and steps into the society. As he moves up the hierarchy, he will find that an inability to communicate with others will impede his progress.
Just as the cat likes it when your child makes meowing sounds. People get comfortable when someone they meet for the first time adopts familiar ways of relating to them. This involves everything from walking and talking a similar fashion to using similar words. Imitation is other the most sincere form of flattery.