Mark Bolotin has travelled all over the world recording singers, beatboxers, and storytellers. He projects their voices and faces onto disembodied “heads” to create the world’s weirdest 12-headed choir. Attendees at World Maker Faire got to play the “Lumiphonic Creature Choir” via a small keyboard—each key triggered a head to begin speaking. Host Katie Linendoll spoke with Bolotin about his bizarre creation, how he finds creatures for the choir, and what it’s like to travel with a bunch of heads.

Popular Science checked out the most amazing, innovative, and crazy projects at the 2015 World Maker Faire in New York City. Watch our complete coverage here. You can hear more from Katie on her podcast.