Here’s some kid wisdom on everyday superpowers. Picture it. The kids and I are on a packed commuter train at 8:27 a.m. We’re standing, of course, because it’s a Monday morning and everyone has to get to work on time on a Monday. By Friday, they won’t care as much, and the train will be less crowded. I’m wearing my son’s backpack because 2nd-grade homework is HEAVY and holding my own backpack with my left hand. With my right hand, I’m holding onto one of the vertical bars to keep my balance as the train stops and starts. The kids are clustered next to me, attempting whatever movement they can…