Mine are 6 and 4 and the bickering, screaming and arguing is incessant.
My 4 yo woke early today and we were watching Shrek together and it was lovely and calm and fun. Then the 6 yo woke up and appeared and that was it: both trying to sit on the same chair and shoving each other, kicking, each pushing the other out of the way so the other couldn’t see. So I had to switch it off and both started screaming and wailing.
I do wonder sometimes if it would be better with say a 10 yo and a 4 yo. Different challenges though I am sure!