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the tray contains a spare place for one heptomino
this innovative puzzle utilizes cutting-edge 3D printing technology
Heptomino Puzzle
paint cones are a must-have tool
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How Many Sticks? Sam Loyd Inspired Optical Illusion Puzzle - Fun STEM Tool for All Ages, Great Brain Teaser Game educational gifts the tray contains a spareUnlock the mysteries of perception with our "How Many Sticks?" optical illusion puzzle, inspired by the renowned Sam Loyd. This fascinating brain teaser not only serves as an engaging STEM tool but also challenges users of all ages to enhance their critical thinking and problem solving skills. With its captivating design, this puzzle encourages spatial reasoning and provides endless hours of interactive fun, making it a perfect addition to family game