Oh yes I did this back in HS, except we did it for a week with $5k. How much can you make in a week only checking the stock once a day? I made the most like $200, most people broke even or lost money.
The trick is to buy a lot of cheap stock, like under $2 a share. Then keep an eye on it. I bought an oil company and a few others, if the oil company struck in that week I would have made a fake fortune!