Calibron 12 Wood Puzzle Brain Teaser

The objective is to make a square and fit them into the large opening of the puzzle. There is only 1 solution and it is very difficult to find. We packaged the puzzle unsolved, but the solution is provided. In the frame I made an extra space to hold one of the pieces so that we could package it unsolved. Our version is made from precision cut woods with at least 4 different woods in each puzzle. Ash, Maple, Walnut, Oak, Mahogany, Birch, Cherry, Alder, and other woods may be used with each puzzle have a little unique look.