I was 16 when I started investing in stocks and had a lot more than $112. I saved my money from after school jobs and flipped 5k into 8k in a few months. It took a lot of work though, and when you account for the man hours I put into my research, it really didn't amount to much. I learned a lot though and had fun.
If you want to make money from the stock market, you need a decent amount of capital to work with and you need to do your homework. I recommend the following book as a primer for investing
This guy went to Wharton and ran one of the most successful mutual funds in Wall Street history. He describes his stock picking techniques in this book and makes them very simple and digestible for laypeople.