Yes, robotics is a really interesting subject. I'd love to have a whole bunch of those parts and create loads of different robots with them. The website seems to sell either complete arms or catapiller-tracks or small parts and electronics. I don't think it's possible to make a whole range of different robots with a small set of reusable parts, which is what I would love to do.

Maybe lego mindstorms is better for this? It seems a bit too toy-ish for me. Not sure whether mindstorms parts are sophisticated enough to allow you to build e.g an arm with many degrees of freedom (on a small scale) or make a bot that can lift something heavy.