Ds is 4 and only sleeps for around 10 hours a night - we have persevered with a 7pm bedtime but he wakes up at 5am nearly every day.
I should add that he gets tired in the day, and often falls asleep in the car - which is why we have kept trying to get him to sleep for longer. But I was wondering if we are wrong, and actually 10 hours sleep is normal for a four year old?