"Tried as an adult." The phrase rings with increasing frequency through America's courtrooms. In Michigan, an 11-year-old is charged with first-degree homicide in the shooting death of a playmate. A mentally disabled boy in Florida faces armed robbery and extortion charges that could bring 30 years in prison for stealing $2 worth of food. Faith in childhood, and its corollary that separate courts are required for children because they are developmentally different from adults, appears to be vanishing. Almost forgotten in this climate--in which a New York Times' headline boldly announced that...