Creative Crafthouse Calibron 12 - Impossible 12 Piece Wooden Brain Teaser for Adults - Very Difficult Wood Puzzle - Made in USA

Creative Crafthouse Calibron 12 - Impossible 12 Piece Wooden Brain Teaser for Adults - Very Difficult Wood Puzzle - Made in USA

Simple concept, near impossible execution: The goal of the Calibron 12 is to fit all 12 pieces into the large opening of the puzzle's base. Many will try, but almost no one will be able to solve this puzzle. We do provide a solution and instructions. PRECISION CUT WOODS - Made from high-quality woods including Ash, Maple, Walnut, Oak, Mahogany, Birch, and more. At least 4 different woods used in each puzzle Perfect gift for your favorite genius and puzzle lover - Due to the extreme level of difficulty this puzzle is perfect for the very smartest of your friends and family. Ideal for the Dad who has everything or your engineer sister. Handmade in the USA - Creative Crafthouse makes every Calibron 12 wooden puzzle right here in our Hudson FL workshop. The square opening is about 6.3" x 6.3" with 1/4" thick puzzle pieces cut from various different wood types. Unique history and puzzle origin - The Calibron 12 was originally designed by Theodore Edison, son of inventor Thomas, in 1933. A brief history is laser engraved on the frame making it perfect for puzzle collectors and history fans.

A very difficult puzzle meant for adults or extremely bright and patient young adults. The objective is to fit all the pieces in the large square opening.

There is only 1 solution and it is very challenging to find. We packaged the puzzle unsolved, but the solution is provided.

I also laser engraved the relative size of each piece on the piece itself, which may be helpful to you folks who want to attack this analytically. It also makes identifying the pieces easier if you just want to use the instructions to solve it,

Puzzle measures 9" x 7" in the base. The square opening is about 6.3" x 6.3" One of the many things I like about this puzzle is that it does not look nearly as difficult as it actually is. People seem to get absorbed in it quite readily as you always seem to get close. It fact though, it is a difficult level 5 (of 5) puzzle.