It's wrong for children to bully each other.
Jamie is playing with his friends in a park when a smaller boy comes and sits next to him, his friends laugh about Jamie making friends with a smaller child.
Jamie wants to get his friends to stop laughing at him.
Jamie tells his friends it's not funny, and he can be friends with whoever he wants.
Jamie pushes the little boy off of the log they are sitting on and tells him that he doesn't want him around.
The little boy is happy because someone stuck up for him and Jamie feels proud that he defended himself when his friends acted badly.
The little boy feels awful because the other kids don't seem to like him and Jamie feels badly because he doesn't really mind playing with smaller boys.