I know this sounds like a weird problem to have - ds1 (2.3) will have a nap for a couple of hours during the day, go to bed between 6.30 and 7pm and not wake up 'til between 8 and 9 (he's still not awake now). Even when his younger brother wakes up, I can go and get him and ds1 still doesn't wake up. Do you think I should be worried? Or just count my blessings?