Wednesday, before dinner I was getting drinks ready. I notice thomas had a cup in the fridge with just a bit left in it, I filled it up, put it back. Later, at bedtime, Thomas wanted a drink. He got his drink out and asked me if I had filled it up and said "Thanks! You get a dollar for that."
Thomas went to his room and came back with a dollar. I gave it back and told him he deserved it fir being so thoughtful and thankful.