How 3 pencils play the pipe organ?

I've just returned from my church where I've demonstrated the organ to the group of students from the Art Academy with whom we are collaborating on a project "Living Organ". They are not interesting in a classical organ repertoire. Even improvisations that I do regularly are too traditional for them. What they really want are some experiments with the sound. Let's call them "Soundscapes".
​
Today they wanted me to show if the organ can imitate human voice. Then the sound got out of hand, I used 3 pencils to create some exotic colors - a submarine, a spaceship and of course - a vacuum cleaner. Let me know what you think.