Japanese puzzle boxes were developed 150 years ago to store worker's tools in boxes that had no locks and could not be opened without knowing the intricate sequence of sliding panels. We use them for teaching security concepts to both kids and engineers. Watch the video with Kenji Nakazato in Hakone, Japan. He is one of the designers of these boxes and works with the Izumiya company. Hakone is west of Tokyo and is one of the only places in the world that produces these works of art. Each box takes about a month to produce. See my article on Forbes about puzzle boxes.
