If you like playing with words and mulling over puzzles you might like trying to solve riddles. If you also have a cat, then you might be more interested in solving riddles about cats.
For example, “What did the boy cat say to the girl cat on Valentine’s Day?” (Answer: “You’re purrr-fect for me!”)
Play with words and play with cats. What better way to exercise your mind and relax at the same time?