Some books by literary heavy weights written for children.
http://www.brainpickings.org/index.php/2011/07/19/7-childrens-books-by-adult-literature-authors/
http://www.brainpickings.org/index.php/2011/07/25/childrens-books-by-adult-authors-2/
I just read Haroun and the Sea of Stories, and I recommend it to children all ages