if i knew about compound interest and started watching the markets at 13 I would be 12 years smarter than I am now about the markets. The sooner the better. Every year spent learning a new thing is a year well spent. Your son needs to have a kid's life also, you know kicking a football or playing cricket. Too many kids spend all day inside these days. Still try and balance it. I dont have kids so I cant really say how you must raise your kid. Still think him learning the markets is great.