--- product_id: 21232740 title: "Calibron 12 - One Of The Hardest Puzzles" brand: "creative crafthouse" price: "€ 99.15" currency: EUR in_stock: true reviews_count: 8 category: "Creative Crafthouse" url: https://www.desertcart.gr/products/21232740-calibron-12-one-of-the-hardest-puzzles store_origin: GR region: Greece --- # One unique perfect solution Rated 11/10 difficulty 12 solid wood pieces Calibron 12 - One Of The Hardest Puzzles **Brand:** creative crafthouse **Price:** € 99.15 **Availability:** ✅ In Stock ## Summary > 🧩 Unlock the legendary challenge that only the bold dare to solve! ## Quick Answers - **What is this?** Calibron 12 - One Of The Hardest Puzzles by creative crafthouse - **How much does it cost?** € 99.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/21232740-calibron-12-one-of-the-hardest-puzzles) ## Best For - creative crafthouse enthusiasts ## Why This Product - Trusted creative crafthouse brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Timeless Design:** Faithful 1933 Theodore Edison original—merge history with your modern puzzle obsession. - • **Engage Deep Focus:** Plan days or weeks of immersive play—perfect for engineers, collectors, and serious solvers craving a challenge. - • **Master the Impossible:** Tackle a puzzle rated 11/10 on the difficulty scale—only the sharpest minds prevail. - • **Heritage Craftsmanship:** Handmade in the USA with laser-engraved ash, maple, and walnut woods—an heirloom-quality brainteaser. - • **Gift the Ultimate Brain Workout:** Comes complete with solution sheet and elegant wood cover—ideal for professionals who value intellectual prestige. ## Overview The Creative Crafthouse Calibron 12 is a handcrafted, laser-engraved wooden packing puzzle made in the USA, featuring 12 solid wood pieces that must fit perfectly into a single square with no gaps. Designed by Theodore Edison in 1933 and rated 11/10 in difficulty, it offers a serious challenge for experienced puzzlers, engineers, and collectors. This heirloom-quality brainteaser includes a solution sheet and is crafted from premium woods like ash, maple, and walnut, making it both a mental workout and a stunning display piece. ## Description desertcart.com: Creative Crafthouse Calibron 12 Impossible Wood Packing Puzzle, Made in USA | Theodore Edison's 1933 design, faithfully reproduced; fit twelve odd rectangles into one solid block, rated 11 out of 10 : Toys & Games Review: Nice puzzle - Nice quality; a bit pricey. Review: Beautiful puzzle that is challenging - What a tricky brainteaser! I bought this as a Christmas gift for my husband who really enjoys brainteaser puzzlers. It is difficult enough to keep him occupied and fun enough to make him come back to it again. The craftsmanship is really nice, and the seller is very prompt and communicative. I would definitely buy from Creative Crafthouse again. Recommended for: brainteaser fans, puzzle fans, high difficulty level, people who enjoy well-crafted wood puzzles ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00A7EZX74 | | Additional Features | Handmade, Laser Engraved, Made in USA, Portable | | Age Range Description | Adult | | Best Sellers Rank | #7,062 in Handmade Products ( See Top 100 in Handmade Products ) #338 in Handmade Toys & Games #452 in Assembly & Disentanglement Puzzles | | Brand Name | Creative Crafthouse | | Color | Brown | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.6 out of 5 stars 153 Reviews | | Educational Objective | Brain Teaser, Logical Thinking, Spatial Awareness | | Included Components | 12 puzzle pieces, Instruction and solution sheet, Puzzle base, Wood cover | | Item Dimensions | 9.4 x 7.5 x 0.9 inches | | Item Dimensions L x W | 9.5"L x 7.5"W | | Item Shape | Rectangular | | Item Weight | 10.4 ounces | | Manufacturer | Creative Crafthouse | | Manufacturer Part Number | Calibron | | Manufacturer recommended age | 16 years and up | | Material Type | Wood | | Material Type Free | Wooden Puzzle Free of Non-Wood Materials | | Model Number | Calibron12 | | Number of Items | 12 | | Number of Packs | 1 | | Number of Pieces | 12 | | Number of Players | 1 | | Operation Mode | manual | | Play Activity Location | Tabletop | | Product Style | Calibron 12 | | Puzzle Type | Assembly & Disassembly | | Size | 9.5" x 7.5" x .75" | | Skill Level | Impossible | | Theme | Brain Teaser, Geometry, History | | UPC | 696735679378 | | Unit Count | 12 Count | ## Images ![Calibron 12 - One Of The Hardest Puzzles - Image 1](https://m.media-amazon.com/images/I/91Ri8sARrsL.jpg) ## Questions & Answers **Q: is the answer sent with the puzzle?** A: Yes, we do include the solution with this puzzle. Try not to look though. **Q: looking for a difficult puzzle that can’t be solved in 10 minutes. Is this the one I’m looking for?** A: No, this puzzle is a challenge. I gave one to a relative & their extended family worked on it off & on thru Xmas vacation. My nephew did finally get it:))). It is addictive! **Q: After you solve the puzzle does this become a dust collector?** A: No! I have it out on my coffee table & anyone who sits near the table picks it up and gives it a try. My grandchildren work at it every time they are over:) **Q: Does this come with a cover?** A: Thanks for your interest. The version on amazon does not come standard with a cover; however a cover is available as a $4 option. The version on CreativeCrafthouse site does come standard with it. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice puzzle *by K***5 on April 2, 2026* Nice quality; a bit pricey. ### ⭐⭐⭐⭐⭐ Beautiful puzzle that is challenging *by M***S on December 13, 2016* What a tricky brainteaser! I bought this as a Christmas gift for my husband who really enjoys brainteaser puzzlers. It is difficult enough to keep him occupied and fun enough to make him come back to it again. The craftsmanship is really nice, and the seller is very prompt and communicative. I would definitely buy from Creative Crafthouse again. Recommended for: brainteaser fans, puzzle fans, high difficulty level, people who enjoy well-crafted wood puzzles ### ⭐⭐⭐⭐⭐ Great gift *by A***K on February 28, 2024* Very nice gift. Wood is soft. It comes as shown. No box. Be aware that instructions are inside so better open plastic seal and take them out so there is no temptation. This was a gift. The person trying to solve it invested a whole afternoon and could solve it by himself. It was solve in another half an hour with some help. I guess it could have been solved in a whole day with more patience. ## Frequently Bought Together - Calibron 12 Handmade Wooden Puzzle – Hardest Brain Teaser for Adults & Teens - Difficult Puzzle for Adults - The Cracked Egg - 7 Piece Wood Brain Teaser Made in The USA from Creative Crafthouse - 10 Penny Puzzle - A Circle Packing Problem - Ten Mint Pennies are Included --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/21232740-calibron-12-one-of-the-hardest-puzzles](https://www.desertcart.gr/products/21232740-calibron-12-one-of-the-hardest-puzzles) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-08*