So to facilitate the training of camp attendees (and design engineers) next summer, I purchased many different puzzle boxes in Hakone to use as teaching tools.

FORBES: Japanese Secret Boxes: The Coolest Security Puzzles for Kids and Adults

My colleagues and I used puzzle boxes to show these kids what we do for a living, and more to the point, to engage their minds.

FORBES: Japanese Secret Boxes: The Coolest Security Puzzles for Kids and Adults

That process requires a very different kind of thought process and one which I developed as a child when I discovered puzzle boxes in Chinatown in San Francisco.

FORBES: Japanese Secret Boxes: The Coolest Security Puzzles for Kids and Adults