Especially at a younger age, you have to focus on some concrete "thing" with constant little minor improvements. I think most high school kids would be best ser

Especially at a younger age, you have to focus on some concrete "thing" with constant little minor improvements. I think most high school kids would be best served building out something like Battleship or Yahtzee (e.g.) in Javascript and the browser. Let the kids pick what part to build next. But doing it in a webpage with the ability to simple add new UI elements one at a time and new small functions, progress is obvious and immediate. At this age, we should be focused on exposure and excitement not inheritance and typing.