You'll need at least Internet Explorer 5.0, Mozilla Firefox 1.5, or Netscape 7.0 to use this tutorial. You can go to any of these Internet sites to download a higher (free) version of the browser.
Your browser must enabled to accept cookies, which (in the computer world) are pieces of information that allow your computer to communicate with ours.
To experience all the effects, you'll need the Shockwave Flash plug-in, a free application that enhances your browser and makes this site interactive. If you can see the animation below, you already have the plug-in.
If you can't see anything, go to the Macromedia Flash Player Download Center and follow their downloading directions. Or, you can click on "Non-Flash Version," whenever you get to a Flash page.