You have a wonderful child. Then, when he's 13, gremlins carry him away and leave in his place a stranger who gives you not a moment's peace.
Think about how much it costs to incarcerate someone. Do we want them just sitting in prison, lifting weights, becoming violent and thinking about the next crime? Or do we want them having a little purpose in life and learning a skill?
Of all work-schools, a good farm is probably the best for motor development.

