One of my oldest son's gifts from his grandparents was a used, wooden chess set. They also gave him a cute software game that teaches the basics of chess in a very novel, simple way.
He has great fun "training" to play King Black in the final phase of the game. I have been surprised at how quickly he has picked it up. We have already had several chess matches and he has even won once! Just what I needed; something to make him even smarter and more strategic!