{"product_id":"slothouber-graatsma-puzzle-777-cube-37254","title":"Slothouber-Graatsma Puzzle | 7×7×7 Cube Packing Puzzle | Advanced Mathematical Brain Teaser | Polycube STEM Challenge","description":"\u003cp\u003eCan you build a perfect 7 × 7 × 7 cube?\u003c\/p\u003e\n\u003cp\u003eThe Slothouber-Graatsma Puzzle is one of the most celebrated three-dimensional packing puzzles in recreational mathematics. At first glance, the pieces appear to be simple rectangular blocks—but assembling them into a perfect cube is a remarkably challenging exercise in logic, planning, and spatial reasoning.\u003c\/p\u003e\n\u003cp\u003eOriginally designed by Dutch puzzle creators Jan Slothouber and William Graatsma, this puzzle has fascinated mathematicians, engineers, and puzzle enthusiasts for decades. Its elegant design hides surprising mathematical complexity beneath its simple appearance.\u003c\/p\u003e\n\u003cp\u003eOur oversized editions transform this classic puzzle into an impressive centerpiece that’s just as enjoyable to display as it is to solve.\u003c\/p\u003e\n\u003cp\u003eWhat’s Included\u003c\/p\u003e\n\u003cp\u003eThe complete 27-piece set consists of:\u003c\/p\u003e\n\u003cp\u003e* 7 × 1 × 1 × 1 cubes\u003cbr\u003e\n* 6 × 1 × 2 × 6 blocks\u003cbr\u003e\n* 6 × 2 × 2 × 5 blocks\u003cbr\u003e\n* 6 × 2 × 3 × 4 blocks\u003c\/p\u003e\n\u003cp\u003eAvailable Sizes\u003c\/p\u003e\n\u003cp\u003eSmall\u003c\/p\u003e\n\u003cp\u003e* Cube Size: 135 × 135 × 135 mm (5.3 × 5.3 × 5.3 in)\u003c\/p\u003e\n\u003cp\u003eMedium\u003c\/p\u003e\n\u003cp\u003e* Cube Size: 220 × 220 × 220 mm (8.7 × 8.7 × 8.7 in)\u003c\/p\u003e\n\u003cp\u003eXLarge\u003c\/p\u003e\n\u003cp\u003e* Cube Size: 305 × 305 × 305 mm (12.0 × 12.0 × 12.0 in)\u003cbr\u003e\n* Approximate Weight: 5 kg (11.0 lb)\u003c\/p\u003e\n\u003cp\u003eThe Mathematics Behind the Puzzle\u003c\/p\u003e\n\u003cp\u003eThe Slothouber-Graatsma Puzzle is famous for its elegant construction. Although it consists of only four different block types, assembling them into a perfect cube requires careful planning and a deep understanding of three-dimensional space.\u003c\/p\u003e\n\u003cp\u003eOne of the puzzle’s most remarkable properties is that when the cube is completed, only one of the twenty-seven individual pieces is visible from the outside. Every other piece is completely enclosed within the finished cube—a surprising result that beautifully demonstrates the puzzle’s ingenious design.\u003c\/p\u003e\n\u003cp\u003eBecause of its mathematical elegance, the puzzle has become a classic example in recreational mathematics and continues to be studied and enjoyed by puzzle enthusiasts around the world.\u003c\/p\u003e\n\u003cp\u003eFeatures\u003c\/p\u003e\n\u003cp\u003e* Classic 7 × 7 × 7 cube packing puzzle\u003cbr\u003e\n* Complete 27-piece set\u003cbr\u003e\n* Four different block types\u003cbr\u003e\n* One of the most famous polycube puzzles ever created\u003cbr\u003e\n* Excellent STEM educational resource\u003cbr\u003e\n* Encourages advanced spatial reasoning\u003cbr\u003e\n* Impressive display piece when completed\u003c\/p\u003e\n\u003cp\u003eGreat For\u003c\/p\u003e\n\u003cp\u003e* Puzzle collectors\u003cbr\u003e\n* Advanced puzzle enthusiasts\u003cbr\u003e\n* Mathematics educators\u003cbr\u003e\n* Engineering students\u003cbr\u003e\n* STEM classrooms\u003cbr\u003e\n* Recreational mathematicians\u003cbr\u003e\n* Spatial reasoning practice\u003cbr\u003e\n* Unique gifts\u003c\/p\u003e\n\u003cp\u003eMaterials\u003c\/p\u003e\n\u003cp\u003eCrafted from durable PLA plastic, a biodegradable and eco-friendly material designed for years of solving and display.\u003c\/p\u003e\n\u003cp\u003eDifficulty\u003c\/p\u003e\n\u003cp\u003eExpert\u003c\/p\u003e\n\u003cp\u003eWhile the individual pieces appear simple, assembling the completed cube is a rewarding challenge that requires patience, experimentation, and three-dimensional thinking.\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003eAbout ItemsByCL\u003c\/p\u003e\n\u003cp\u003eItemsByCL was built around one simple idea: every product should spark curiosity or put a smile on someone’s face.\u003c\/p\u003e\n\u003cp\u003eWe specialize in oversized mathematical puzzles that transform classic recreational mathematics into hands-on experiences. Many of our designs have inspired teachers, students, collectors, and puzzle enthusiasts around the world by making complex mathematical ideas both interactive and beautiful.\u003c\/p\u003e\n\u003cp\u003eWhether you’re searching for a classroom centerpiece, an unforgettable gift, or your next great puzzle challenge, our goal is to create puzzles that are as impressive to display as they are rewarding to solve.\u003c\/p\u003e\n\u003cp\u003eThank you for supporting a small business dedicated to making mathematics bigger, bolder, and more engaging.\u003c\/p\u003e","brand":"ItemsByCL","offers":[{"title":"Small (135x135mm)","offer_id":51769430966550,"sku":"3DPrintedPuzzles","price":30.0,"currency_code":"CAD","in_stock":true},{"title":"Medium (220x220mm)","offer_id":51769430999318,"sku":"3DPrintedPuzzles","price":60.0,"currency_code":"CAD","in_stock":true},{"title":"XLarge (305x305mm)","offer_id":51769431032086,"sku":"3DPrintedPuzzles","price":120.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/6486\/3766\/files\/il_fullxfull.8485417879_tupd.jpg?v=1787802187","url":"https:\/\/itemsbycl.com\/products\/slothouber-graatsma-puzzle-777-cube-37254","provider":"ItemsByCL","version":"1.0","type":"link"}