Since my DS has turned 7 in July he's turned into a right nasty child. He swears at us, throws things at us, hits/punches & kicks us. We have tried time out, taking toys away, no sweets etc, early bedtime but nothing seems to work. It takes 3 hours to get him to stay in bed at night it's just getting to the point where I don't know what else to do. He just laughs at us. What else can I do?