Mia set up a yard sale on one of our table the other day. We had some friends over and they had brought lotion with them. Mia decided that she would sell their lotion and the right to use a ball. The other kids were excited to pay $.50 to "rent" it for 10 minutes. I was surprised by her idea, but I was more surprised that the boys were willing to pay it. I made her give the neighbor his money back before he went home.