My children are 4 and 1. The 4 year old (DD) is in reception and goes to sleep very tired at 7. The little one (DS) has been going to sleep at 6/6.30 which worked fine. They share a room but the half hour difference was perfect as my daughter had her not define story in our room then was pretty much ready to sleep when she went to bed where her brother was already asleep. But not anymore. He just stays awake for hours and is really excited to find his big sister coming into the room. So I want to try them n the same bedtime at 7, and see if that works better. But I have n idea how to go about it as the staggered bedtime is all I've done since DS was born. Any ideas?