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So much fun, you can't put it down! Almost like a futuristic-4th dimensional / magical "Sliinky." A mesmerizing kinetic sculpture that folds flat and pops open, surprising everyone. Comes with a
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First published in 1893, this 394 reprint contains over 400 puzzles! There are mathematical and mechanical puzzles. Puzzles dependent on some trick or secret. Word and letter puzzles, wire puzzles! Quibble puzzles,
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