My three yr. old daughter is the playground bully. I’m not sure where this is coming from! We don’t discipline with spanking or yell at her but she is so selfish when she is there. She yells, “go away kids!” or “You can’t play on that swing, it’s mine.” She seems to understand about sharing and being kind when we talk to her but when she hits the playground the claws come out. How can we get her to stop?