DD is 4 and always been a good sleeper. she's recently been having real trouble getting to sleep. she goes to bed at 8pm without fuss and then lies awake until sometimes 11pm. i often find her with her bedside lamp on and flicking through a book. mind you, she just does this because she has tried to go to sleep for a while but couldn't. we've tried wearing her out with activities (both mental and physical) in the day. we've started closing her door more so she is more in the dark. i don't think she's hungry, she'd tell me she was. i have got a stickerchart but it is not much use as she is not refusing to sleep, she just can't. i don't know what to do anymore. she has big red circles under her eyes. last night i went to sleep at 11pm and she was still awake. we got up at 7.30. her normal routine is to sleep from 8pm till 8am. she tells me she's exhausted.