Kid's books - Hobbit, all the way. The Narnia series are pretty good. Also the Starstormers series is worth getting for age-11-ish kids - it's sci-fi fluff, but quite a bit darker than the usual kid's stuff - and some other stuff by the same author (can't remember his name offhand). The Tripods series for the same age group and the same reason.

Wind in the Willows and the William Horwood sequels are good for slightly younger kids, and also for adults who'll pick up on the themes behind it. Also the Jungle Book.

Pratchett for anyone of any age.

Much Roald Dahl, but I'd advise reading it yourself first bcos he wrote more than a few books of adult fiction (and some is _very_ adult :-).

Graham.