These miniature puzzle boxes require a 'knock' to lock and
unlock their secret compartment. Just tap the box firmly on the palm of your hand, then
slide the lid open. The puzzle mechanism is magnetic.
~These
boxes come with a variety of inlay patterns. The inlay pattern on the box you receive may
be different from the pattern shown in these photos.~
A mechanical puzzle is a self-contained object, composed
of one or more parts, which involves a problem for one person to solve by manipulation
using logic, reasoning, insight, luck, and/or dexterity. - Jerry Slocum