Now and then I like to play board games: mostly Blokus, Drakborgen (a.k.a. Dungeonquest), Scrabble and Roborally. The latter is an award-winning 1994 game where each player programs a robot to move through a treacherous obstacle course and tag a series of numbered flags. More often than not, your robot ends up a smoking laser-riddled wreck or disappears down a bottomless hole.
On the box, Roborally is recommended from age 12 up. I am proud to be able to tell you that the game works just fine with (bright, geeky) 9-year-olds as well. Yesterday after lunch I took Junior and his pal geocaching, and then we played Roborally. It was a breeze for them to understand and enjoy it. And I, of course, was very happy to beat them most mercilessly. While I still can, you know.
(Junior asks me to point out that as I tagged the last flag, his robot was nearly at the penultimate one.)