Can't recommend this book enough (and sadly, not enough people take me up on it). Less sci-fi and more anthropological. Includes subtle yet strong Juedo-Christian undertones which I found deeply moving.
In my mind, this is the perfect list of older children's literature. I read these stories as a kid and will read these to my children. The only one I would think to add is "Dandelion Wine" by Ray Bradbury, and of course later in the early teens, some of the books with more adult topics... [[Click for a link to a list of 100 of the best books of all time]]