I once tried knitting as a way to pass time, I just couldn't get it, so I switched to learning how to play the guitar instead, so I just freestyle lyrics in my head and try to make it into music.
I think I'll get a Sudoku challenge book and play with that too.
Playing guitar is cool, I always was impressed seeing people who can play, I hope you continued that and still exercising.
Yes, Sudoku is very interesting game and I think people who try and know how to do it once may love it.