Working on a Sudoku puzzle is one of my favorite pastimes. The one I like the most is called Gattai-5 which is 5 interlocking puzzles. I try to work one of those every day at lunch.
My website: http://claudiahammer.com
My email: firstname.lastname@example.org
My DPW gallery: http://www.dailypaintworks.com/Artists/chammer-209