The complexity of a puzzle box is determined by the "steps" required to open it. Common mechanisms include:

: Originating in Japan’s Hakone region during the late 19th century, these boxes were created by master craftsmen like Ohkawa-san. They are traditionally decorated with Yosegi-Zaiku (fine wood mosaic) to hide the seams of the moving parts.

: Dovetail-shaped notches allow panels to slide back and forth in a specific sequence without falling off the box.

: Modern boxes often include "tools" (like a hidden key or a metal pin) found in the first few steps that are necessary to solve the later stages. 3. DIY and Construction Materials