Brand: Creative Crafthouse

The Creative Crafthouse Calibron 12 is a wooden packing puzzle with a deceptively simple goal: arrange all twelve solid wood pieces into one single square, with no gaps and no overlaps. There is only one correct solution. Most people who pick it up do not solve it the first day, and many never do. The puzzle was designed in 1933 by Theodore Miller Edison, the youngest son of Thomas Edison. Theodore was an MIT-trained physicist who held more than eighty U.S. patents and founded Calibron Industries. Our family workshop faithfully reproduces his design today. The Calibron 12 is documented in a Gathering 4 Gardner research paper, and Creative Crafthouse is named in its acknowledgements. It carries our 11 out of 10 difficulty rating and belongs to our Impossible Series, so it is built for experienced puzzlers, engineers, mathematicians, and collectors who want a long, demanding challenge. Plan on days or weeks, and enjoy the search. Each Calibron 12 is laser-cut from ash, maple, walnut, and other fine woods, with deep engraved markings and a brief history of the puzzle burned into the frame. At least four woods go into every puzzle. It measures about 9.5 by 7.5 by 0.75 inches, a solid, shelf-worthy object meant to be handled for years, not a flimsy novelty. The set includes the puzzle base, a wood cover, twelve pieces, and a printed instruction and solution sheet. It arrives unsolved, so the solver gets the full challenge before checking the answer. Choose the Calibron 12 when you want a serious wooden brain teaser with a famous inventor behind it, a simple objective, and a solve that earns its reputation. It makes a memorable gift for engineers, mathematicians, STEM teachers, dads, and retirements, and for anyone who likes a real challenge.

Features:

• A wooden packing puzzle with a simple goal and a brutal solve: arrange all twelve solid wood pieces into one single square, no gaps and no overlaps. There is exactly one correct solution, and most who try never find it.
• Designed by Theodore Edison in 1933, the youngest son of Thomas Edison and an MIT-trained physicist with more than eighty patents. Our family workshop faithfully reproduces his legendary design for serious solvers today.
• Rated 11 out of 10 on our Impossible Series scale and built for experienced puzzlers, engineers, and collectors who want a real fight. Plan on days or weeks of attempts, and know some solvers never crack it.
• Laser-cut from ash, maple, walnut, and other fine woods, with deep engraved markings and a brief history burned into the frame. Made in our Hudson, Florida workshop as a solid, shelf-worthy heirloom, not a novelty.
• Arrives unsolved with the answer included: the puzzle base, a wood cover, twelve pieces, and a printed instruction and solution sheet. A memorable gift for engineers, mathematicians, collectors, dads, and retirements.

Product Details:

• Color: Brown
• Size: 9.5" x 7.5" x .75"
• Model: Calibron12
• Number of Pieces: 12
• Package Quantity: 1