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#1: Kristen Coolman (kristen) on May 16, 2018
It's a mini sudoku!#2: Randy Robinson (robinson88766) on May 16, 2018
In a way. Each of the 16 buttons had two aspects, color and shape that could not be duplicated in any grouping of four. So yeah, a mini Sudoku. Maybe that's why when I discovered Sudoku a few years later, I enjoyed them so much.#3: Koreen Marcum (mom24plus) on May 28, 2018
great childhood memory!
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