[Kagen Sound] is a woodworker and artist who gives a great behind-the-scenes look at his amazingly high-quality puzzle boxes (video). Not only do his varied puzzle box designs show his math background ...

Riddles are fun, and what are puzzle boxes if not riddles in physical form? This particular box—the "Impossible Dovetail Box"—makes its confusing first impression with a series of dovetail joints that ...