My 3 yr old wakes at bang on 3am EVERY morning. He is non verbal, likely ASD, and still sleeps in a cot bed which he has never tried to climb out of. He is perfectly happy when he wakes, he puts his bedside light on, you hear him humming away to himself etc and he’s awake for about 2 hours before he eventually goes back to sleep. I don’t go into him cos then he thinks he is up for the day. AIBU to leave him whist he’s happy? I would go in if he cries.