We love our LEGO in our household and have done since around 1979, when I inherited a huge box of it from our cousins. Of course my LEGO building was mostly restricted to houses, cars, spaceships and robots.
This incredible video is nothing to do with me, sadly; I spotted it on G+ and had to share it. For those of you not in the know, there is a long heritage of making ball moving contraptions out of LEGO- Youtube is full of them.