He's 5 in December
Reasons I'm wondering are:
Explosive tantrums that last up to 20 mins
Strong specific interests that he doubles down on, it's hard but not impossible to get him to entertain anything else
Sleep never been brilliant and since starting school he's been waking at 4:30-5am
Transitions are really hard for him
Reasons I'm not sure:
He's pretty sociable
Speech and language comprehension are good
He doesn't do any stimming type behaviours
He can concentrate fairly well I think
He's starting to develop some abstract thinking