Made from high quality all wood construction with deeply burned laser engraved numbers from a shop in Spring Hill, FL. 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 9 block model is very difficult with 16,384 possible permutations of the blocks but only ONE correct solution.
Dimensions: 6.5" ong, 3/4" blocks
Difficulty level: 3 (out of 6)
Suggested age: 7+