Last week I was talking to my 22 y/o nephew (on my wife's side), he's now pretty established in his career in the military. He was asking about investing, now that he has a paycheque. anyway, I was explaining what a fund and rrsp are, and he wanted to know a bit about stocks. He seriously believed that stocks just went up, that you couldn't lose money in the stock market.
Now that worries me. But I've heard that plenty of adult students in university these days don't know what the Great Depression -- and the stock market crash -- was, including the 1929 cataclysm as well as the1987 crash. They're also unable to distinguish between WWI and WWII or draw any sort of line between the movements of markets and their broader consequences for either the economy or society.
Investors like your nephew are the ones who tend to ceaselessly watch what stocks they do own, to the point of checking on them numerous times daily, and practically tear their hair out if they lose even a penny in value. They don't understand what going long is, or what going short is, most especially.
So I'm not really sure they should even approach the stock markets until they learn something about them. And they definitely should stay away from options, probably forever. ;-)