one of the best resource lists i know is the Quakerbooks of FGC bookstore
. the online catalog has many subcategories, and you'll find a lot of the titles in your library. for example, there are many picture books for teaching Quaker beliefs. also good resources there for adult reading and reflection.
also great book lists at the Philadelphia Yearly Meeting Library
. they are organized by theme, for example "conflict resolution: children" and "environment: children"
if you had a specific topic or age you need ideas for, i would be glad to help. i have been attending an unprogrammed Friends meeting for ten years now (though in the past year i have been also attending a masjid and immersed in Islam....a long story for another thread