Great advice @donkeypong
I have taken a few Child Education courses that teach the same principles.
It really works when you let your children make the decision in ANYTHING they wish to do or you wish them to do.
My ex-wife used to get pissed-off with me.
She would say; "Tristen tells me you let him do what ever he wants when he's with you?"
I tell her; I give him 3 choices all choices that are ok with me Tristen chooses and thus believes he is making the decisions.
It's called Loving Manipilation .