Challenge the PhD in your family with a trick lock puzzle! We love these brainteasers as smart stocking stuffers. Each metal lock puzzle is solved in a completely different way with a range of difficulties and is harder to solve than it looks. Grab a few – they make beautiful desk toys or fidgets for teens and adults. Available in 3 different styles: Grecian Trick Lock, Roman Latch Lifter, and Egyptian Pin Lock, each sold separately. From Project Genius for ages 8+ yrs.
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