Tangram Puzzle for Adults -Teens - Kids Age 7 and up I Deluxe Japanese Crayon Puzzle Box Design I Wooden Brain Teasers, Mind Bending Puzzles - Level 4 - Difficulty: 8/10 -
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Amazon.com: NKD Puzzle - Wooden Mechanical 3D Puzzle for Adults - Brain Teaser - Puzzle Box - Minipunk - Easy Level - 48 Pieces
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