I'd say Cottage Living is a must! She will love the animals, and most features are very easy to use no mater what world she plays in. Second option might be Get Famous, depending on her interests of course. The pack might seem rather dull if you don't want to be an actress, but thee is lots of ways to build fame, and it is not spreading like it did in TS2. Depending on her playing style, the fame can also be used for other groups, like I like my Politicians to have some fame. Del Sol Valley is tiny, but still has a different feel than other worlds.