Stock Markets Exposed - Stock Market?

Stock Market?

I got $70 dollars how can i invest that in the stock market?

Badly. Sorry to be so blunt, but given that the commission will probably be ten bucks or more, you'll start 14% down.
dump it into your 401k.
If you are going to invest on a regular basis you should take a look at ShareBuilder. See if it is right for you. The company has been around a long time and is part of ING Direct so it is legitimate. On the other hand if you are going to invest one time don't waste your money, just put the $70 into a savings bond. ShareBuilder is at: http://content.sharebuilder.com/MgdCon/Jump/Web/welcome/otbonus_j18/index.html
We are in a "bear market" and could be for a long-time. The Fed is going to continue to drop interest rates just like Japan did in the 1990s. If the US market is anything like the Nikkei, the US market is the WORST place to be a buy-and-hold investor. Let's say you started working in Japan in 1989 and added $5000 to your 401K every year... you would still be underwater 18 years later!! That is a taste of what is to come for the U.S. The US market and brokerage firms have "conditioned" the American investor to be buy-and-holders ever since witnessing the best bull market in US history (1980s-current). That is now changing!! The places you want to be is gold, silver, agriculture, alternative energy, oil, commodities, etc. If you can short the market using an inverse fund (Rydex or Profund), you can probably do very well there too.