My son sent me this link tonight that will appeal to the Rube Goldbergs among us. I wish I knew more details about it, it looks like the result of a Japanese (?) contest, and some of these folks are astonishingly creative, particularly the one where the marble plays the melody on the water glasses.

There are so many common elements in the constructions that perhaps there was some sort of "kit" and rules to follow?

I can only imagine the number of hours (Tens? Hundreds?) that went into some of these.

See for yourself...

Oh, and look! There's a sequel!

tanstaafl.