Sharpening those wits... I'm thinking sudoku, crosswords, riddles... do you like any brainy games like these?
I games and puzzles.
Crosswords, Words with friends
NSA Crypto Challenge is my crack du jour.
Simon Shuker's code cracker is my favorite but I can only rarely find them.
Writing rhymed and metered poems is like a puzzle...kinda like a crossword--more freedom but also more work.
One of my best friends travels a lot with his job, and is always bringing home cool games to play with his friends and family. It's through him that the kids and I were first exposed to Dixit, Gloom, Exploding Cows, and several others (whose names are french so we had to play with his wife acting as an interpreter). Usually, I like to jump right in so we can learn to play; I digest the rules better that way.