I was recently at the playground with my son and nephew watching them scale a pair of slippery, rounded parallel bars. Granted, my son has had stitches no fewer than four times in his short life. While I was hovering, imploring my headlong six-year-old to dismount, I knew I should have just let him walk without interruption, and yet I couldn’t stop myself. I rationalize that he, unlike my nephew and other son, needs reminders, oversight, hovering, but the reality is that I should do far less cautioning. How else, after all, will they ever learn?