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Put your problem-solving skills to the test with this eclectic mix of ten pocket-sized puzzles! From the Rings of Fire to the Trapeze, each matchbox

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The Einstein Collection E=Mc2 Metal Brain Teaser Puzzle Set

Formed of the symbols of Einstein’s ground-breaking E=mc2 equation, see if you can separate the two pieces of each metal puzzle and then reattach

Professor Puzzle The Einstein Collection E=Mc2 Metal Brain Teaser Puzzle 3 Piece Set