If I could go back in time, I would probably study robotics. I'm considering going back to school and studying it now. I think I might start by buying the Lego Mindstorms NXT. It's a robot that you can build and publish. You use the Legos to make a robot in different shapes and forms. Mindstorms is the Lego line that deals with robots and such. And NXT is the "brain" of the robot. So that's what Lego Mindstorms NXT is. It's for ages 10 and up and can be for beginners to more advanced.

http://www.legomindstormsnxt.info