After you have done a bit of programming in plain python, we can extend it to be capable of creating our own 3d games with a "game engine" called panda3d.  Basically what it does it load a library of pre-written code that you don't have to write and that has methods of drawing 3d objects in a window.  Panda3d was developed by Disney and is used to develop their games. ( see some examples of games developed with panda3d goto www.panda3d.org.  A nice advantage of panda3d is your games can be run on multiple operating systems (windows xp, vista, mac OSX, linux.)  Unlike other programming languages.  Panda3d has lots of very useful features that make it easy for a beginner to make their own 3d game.

    To install the panda files on your computer goto www.panda3d.org and  I recommend you take a look at the actual panda3d's manual guide to installing. (Windows , Linux)