No one knows as many secrets as Kagen Sound (formerly Schaefer). Sound is a full-time artist, known for his wooden boxes that are much more than what meets the eye. To open them, one has to solve secret mind-bending puzzles, invisible at first glance. The boxes contain rotating discs, sliding tiles, and other hidden elements. Kagen is acknowledged as a master craftsperson by the Karakuri Creation Group, the world’s only guild of secret box makers.