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TIL many puzzle manufacturers reuse the dies which cut their puzzles into pieces, so pieces from one can fit into another. And one man has turned this into an art. : r/todayilearned
Amazon.com: NAKLEO 5 pcs Reusable Plastic Stencils - Puzzle Element Jigsaw - 13.4" to 3.5" - Pattern Children Kids Painting Template Room Decor - Craft DIY Wall Furniture
Amazon.com: Metal Jigsaw Puzzle Combination Cutting Dies,Jigsaw Die Cuts Embossing Stencils Template Mould for Card Scrapbooking and DIY Craft Album Paper Card Decor
Can you solve it? The simple question almost everyone gets wrong | Mathematics | The Guardian
What To Do With Old Puzzles: Puzzle Recycling 101 | Blue Kazoo
Amazon.com: NAKLEO 5 pcs Reusable Plastic Stencils - Puzzle Element Jigsaw - 13.4" to 3.5" - Pattern Children Kids Painting Template Room Decor - Craft DIY Wall Furniture