How can you play the stock market without any money? I've been playing "Stock Star", a four-month stock trading game sponsored by the Financial Post. I'm sure no-one planned that the stock market would collapse practically as soon as I started playing, but it's been pretty wild. It's surprising how interesting playing with virtual dollars can be. Fortunately, there are prizes offered just for participating, so I have a chance of winning, as well as for best performance by mid-January.