Punishment?

This hardly looks like a punishment, does it? BUT IT IS! When my sister and I were very little, and the bickering got too much, my mother told me she would have my sister and I hold hands, and run laps around the backyard, without being able to let go. By the time we were around a few laps, we'd forgotten about the bickering, and were laughing at each other.

We decided to try this on Cooper and Ava, and, for the most part, it works (for now!) Of course, two weeks ago, when they were getting a little loud, Cooper asked "can we hold hands and run in the backyard?" Hummmm.....