Anything BUT movie tickets or iTunes gift cards or DVDs?

My father is impossible to buy for because anything he wants is too expensive, but he loves watching movies and going to the movies with me, so I always get him the above-mentioned gifts.

Any ideas for anything different? I need to place my Amazon order and I am struggling!

Oh, also, he's the one that got me into that Temple Run OZ game for the iPad, but we used to play this game called Myst on the computer when I was younger. So any suggestions for computer games are also welcome. I just looked on Amazon and there's a sequel game called Riven that looks like it might be cool?