The music becomes annoying after a while but it's fantastic how it shows the way the engine works. My lads were absolutely fascinated by it & wanted it on their computers. I had to sit there telling them what each piece was - trouble was, I was having senior moments (couldn't remember basic names like the collets on the valves etc )
The original link I had no longer works but you can google 'deutz engine' to find other links to this great screensaver. One worth grabbing & storing somewhere else in case it goes?