How much do you intervene?

[playfelt]

I just glare at them with that stern slightly louder voice and say "Excuse me....that is enough". Point is they know and most of the time they are doing it just because.

I let it go for a bit ex the green plates to see if they can resolve the issue and to get a handle on who seems to be the instigator or what is setting things off, ie patterns of behaviour then I step in. By just using the excuse me - and they all know now that means "knock it off now" it just goes away and no one gets in trouble, nothing else happens it just ends there. Don't care who started they are both guilty by that point.

Rough housing is not allowed due to potential for injuries - save it for at home and weekends. A bit more leeway for siblings but just a wee bit before they get the same excuse me warning.