What’s with kids and screaming? They screen for almost anything, it doesn’t make sense.
Or does it.
Being the smallest members of the household they feel they need to be heard, so they make sure they are.
Being one of two or three or four or… they need to express their presence amongst the masses, so they scream.
In all my interactions there doesn’t seem to be much you can do about the screaming, I guess just try and minimise it by quick responses, and positive reinforcement.