My son is 2.5 hes always been an early riser but recently hes waking at around 5am and shouting until we come into him, he refuses to settle himself again and we end up having to get up with him. His bed time is 7pm and Im really loathe to make it later as I cherish that time in the evening for myself and my husband. How can I encourage him to play queitly in his cot for an hour or so until its a more social hour to get up?