Bass, theremin, keys, guitar, wooden ratchet, spin whistle, and... kazoo?!? Song 5 of 6 from the upcoming 12-minute instrumental rock-opera for kids - Mr. McWurkle's Workshop.
Story behind the song
Song 5 of 6 - This one is the showdown between the evil Dr. Reevole and Mr. McWurkle. See "Contrabulous Frabulation" for the finale.