Vista games for my grandparents

holophrastic writes: "So my grandparents are now touching a computer for their very first time! (she's 75, he's 85) They've got a nice and creamy-smooth Vista machine to play with. I want to buy them some games, and I'm looking for some suggestions. Ultimately, duplicate bridge online (acbl.org's Bridge Base Online) is keeping them many hours per day. I've got them learning to type with The Typing of the Dead, and they love it, funny as that is. Any other ideas? I'm thinking that it has to be something with a flat interface that they can easily use, since they've never seen anything before — so that rules out FPS, Sierra quest games, and galactic conquest. Most arcade games are going to be too frustrating for them when they forget which sprite is them, and which sprites are the baddies. I'm thinking the incredible machine, myst, and tetris. But I haven't the foggiest as to where to find Vista versions. Any other ideas? (oh yeah, on-board video/audio/nic, core 2 duo, 1.8GHz, 2Gb, vista ultimate, 24" wide)"