DD is 8. She is a real evening person - full of energy in the evening and finds it really, really hard to settle. I've tried giving her a bath, letting her read before bed and wearing her out well in the day, but these don't seem to work. She's still awake now, and says she can't sleep. This is the third time in a week she's not got to sleep before 11pm (she gets put to bed at 8 with light out by 9pm) She's been so tired she's been falling asleep at school and on the couch before dinner. What else can I do?