Getting my boy started too!

So I'm at an absolute loss here and need some help! My son has expressed interest in making lego movies and as far as I'm concerned, it beats the hell out of him sitting in front of the Xbox all day. We have a PC and I was wondering what hardware/software you suggest for a 12 year old kid to use. Also I've seen reference to people using webcams, camcorders, and cameras. He would just be using my camera so does that make a difference in what software we can use? Any help advice would be appreciated.