Challenging brain-teasers and puzzles are a big hit in our house. We like to leave things out, like the Perplexus and the Oblo Puzzle Sphere, in our family room
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test_pleaseRaj NarayanasamyThinkFun Gordians Knot, A Brain-Teaser for Die-Hard Puzzle Enthusiasts: Challenging brain-teasers and puzzles ar..