Just discovered this site last year and really enjoy their puzzles. You can choose your background color and the number of pieces you want to put together. There are daily puzzles and even a weekly mystery puzzle, which I do love. Many categories and a lot of puzzles to choose from. My only complaint would be a way to keep track of which puzzles I have already done. There is no sign-in so cannot keep track except by memory and that can get to be impossible if you do even a puzzle or two every day...after a while they add up. Still worth my daily visit.