Play Market Guesser
This is a fun little game. You try to guess how a stock is going to perform. It makes me not want to invest any money into the stock market. I have included a screen shot to prove that sometimes they do go up in value.

This is a fun little game. You try to guess how a stock is going to perform. It makes me not want to invest any money into the stock market. I have included a screen shot to prove that sometimes they do go up in value.

Or try chartgame.com.
Very similar. More in depth.