I realise this is none of my business but a neighbour has mentioned that his DC sleeps for 6-7 hours a night from midnight to 6am (45 min nap). DC appears to be in good spirits and doesn't appear to crash or say they are tired. I have never heard of this little sleep in a preschooler before. Is this normal for some kids? Neighbour seemed to imply my DC and I slept too much and went on to talk about people like Elon Musk who sleep for 3 hours a day. AIBU to think this is not a healthy amount or are some kids like this?