My son has expressed an interest in getting into robotics as a hobby/learning exercise, which is pretty exciting to me, too. I want to get us set up to do some fun stuff, and I don't want things to be too hard so that we never really get started. One of the obvious choices for this is the Lego Mindstorms system, but the software that comes with it is designed only for Windows and Macintosh systems. Fortunately, there are free software alternatives. What will it cost in time and money to set up using our Debian GNU/Linux computers, and what will we get for that effort?