Here is a fun demonstration video of Japanese machine artist Nobumichi Tosa's bizarre electromechanical musical instruments. From a description of Tosa's work on Sweatfrog.com:
Maywa Denki is an art unit produced by Nobumichi Tosa. It was named after the company that his father used to run bygone days. Its unique style is indicated by a term he uses: for example, each piece of Maywa Denki's work is called "a product" and a live performance or exhibition is held as "a product demonstration." The products produced so far include "NAKI Series," fish-motif nonsense machines, "Tsukuba Series," original musical instruments, and "Edelweiss," flower-motif objet d'art. Although Maywa Denki is known and appreciated as an artist, its promotion strategies are full of variety: exhibition, live stages, performances, producing music, videos, writing, merchandising toys, stationery, and electric devices.