21 wk old ds sleeps at 7.30,wake up at 11.00 has a feed and goes back to sleep by himselfimmediately. however, wakes up at 4.00 am bright and alert, wanting to play after his feed!we make it a point not to switch the lights on etc.after much cuddling and rocking, finally sleeps at 5.30.if we try to put him on his bed and shut the door, he rolls over and has his hands caught up in the spars and starts screaming.very exhausting!any ideas on how to break this habit?