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Made from high quality all wood construction with deeply burned laser engraved numbers in a shop in Spring Hill, Florida. The blocks stay as a string but will rotate individually. The idea is to rotate them until there is a correct equation on all 4 sides of the blocks. The equation is read from left to right. The 7 block model may look easy, but there are 1024 possible permutations of the blocks and only ONE correct solution.
Measures: 5.5" long, 3/4" blocks
Difficulty level: 3 (out of 6)
Recommended for ages 7 and up