2.7 Sun 12 Step Akaasa Japanese Puzzle Box Requires 12 steps to unveil the hidden space. A small amount of MDF is used for a small portion of the inside of the puzzle. *Difficulty-Moderate to Difficult Comes in cellophane wrap with instructional diagram.. Measures* 3 x 2.23 x 1.80 inches Secret Compartment measures approximately* 1.5 x 1.5 x 1.2 inches