So, I was wondering what was involved in building a robot out of scratch. It would be remote controlled, but I may want eventually run it off of a old laptop.

I've looked up some of those robots of those hack it sites, and wanted some advice of what type of things I would need.

It would be like a mini tank, about the size of a small cart. Right now I'm wondering on how I would begin the body, I could add all of the motors later.