Listen to a Catchy Tune Played by Marbles From This Amazing Music Machine

This marble machine was build by Martin Molin. He planned the programmable machine ahead of time but it still took over a year to gradually shape and perfect this contraption. According to Molin, it's still not quite finished. He told WIRED:

The marbles, you know, they behave like water. The nature of water is that it just breaks through everything. After 100,000 years it can make a hole in stone. The marbles act like that, it doesn't matter what I'm doing to try to tame them. They are just flooding every wall I'm putting up. ... I'll have to fix some escaping marble issues in order to tour.

He is planning on making new machines that are a little more portable so that he can take them on tour easily.