[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 ...

When puzzles were first invented, they were made out of wood, and carpenters used jigsaws to cut the pieces (which explains how they got their name). Perhaps that’s why it feels so good when you put a ...

Forbes contributors publish independent expert analyses and insights. I am an investigative attorney and physical security specialist. Think of a wooden box that is as large as a foot square, with ...