I'm aware that kids can be difficult, and I've heard some children, even older children, occasionally need to be subdued if they are having a tantrum. But while I was on the sidelines at my daughter's indoor soccer practice last spring, I noticed a mother of a girl on the team standing there with her 12-year-old son.The boy was not part of the team, and I had never seen him before, but as I was standing close to them I could feel that there was a tension between them.