Here's a little booklet that my wife found which contains a list of good books for kids to read. The author, Theresa Fagan, has split the list into age categories: 2-7, 8-12, 13-17 and 18 and over. I'm using the list presently to help in the fueling process of my 8-year-old's voracious reading appetite.
Here's the author's pitch for A Mother's List of Books from the page on Adoremus Books:
"This list grew out of a desire to offer children books that delight, inform and inspire. It is by no means exhaustive. A few of the books are great, most are good and some are just pure fun. But they all respect the dignity of the human being. The list includes many lesser known books that are out of print but that are well worth looking for (interlibrary loans). The age categories are only approximate; many of the books could appear in two or three of them." -- Theresa A. Fagan
This list could probably be a benefit for non-Catholics as well. Likewise I'd be willing to look at other lists compiled by any people of good will.