Funky construction toy from the 80s, that had motorised parts. You could do some seriously groovy stuff with it - including infrared control, cable cars, amphibious vehicles, boats, and more - years and years before Lego thought up that Mindstorms thing. I would very much like to get my hands on (and hack) the 5000(?) set. My thinking being that Capsela although not as versatile as Lego, is surely more robust and designed more with robotic / kinetic function in mind.