Have you heard of Launch Pad? I think I originally found the link through HoagiesGifted. It's a new magazine that publishes kids' art and stories. It's currently just published online, I think. They're seeking submissions for future issues, though. Maybe some of the future issues could provide a starting point for little projects in art or writing. The last time I checked they listed what their future issues' subjects will be.
It doesn't really answer your original question but I thought it might be helpful.
http://www.launchpadmag.com/index.shtml
