My youngest daughter and I have a game we call “Pinchers.” When she goes up the stairs, I’ll chase her and try to give her a little pinch. The rules are that I can only pinch her (gently, of course!) when she’s on the stairs. Once she’s at the top, she’s safe. Sometimes, though, she’s not in the mood to play. And if I follow her up the stairs, she’ll sternly say, “No pinchers!” I’ll respond, “No pinchers. I promise.”

Now, that promise may seem a little thing. But when I do what I say, my daughter begins to understand something…