Well, that more or less sums up my point.Amalith said:KOTOR (or Mass Effect if you think the laptop could handle it) seems like it would work pretty well.
Though not an RPG, Beyond Good and Evil isn't that hard, and seems like it would be a good start.
Those games all have interesting enough plots, settings, and gameplay to keep her interested, they're all a hell of a lot of fun, and (I think) they're all on Steam... but don't quote me on that.