I give books to kids frequently. Especially if I know their interests well. I try to go outside the standard "classics" picture books and get newer authors, and lesser known titles by famous authors. For older kids, I try to find new series that are relevant to their interests or similar to books I know they like. Graphic novels are fun too.

Gaylord Archival (gaylord.com, I just checked to make sure I wasn't sending you to some dark corner of the internet) has preservation materials for just about anything you'd care to preserve.