Hello,
My family loves playing the ColorKu version of Sudoku together. One of my favorite parts is putting the colored marbles away after completing a puzzle -- the board takes on many different feelings as you remove one color at a time. I'm an artist, and I recently made an edition of a sculpture that was inspired by that experience. I thought I'd share it with other ColorKu fans!
https://www.douglasrepettodesign.com/post-mesopic-visions/
best,
Douglas