Flotsam, by David Wiesner

A young boy discovers a camera in the surf at the beach and when he develops the film, he finds fantastic images of underwater creatures. But the most amazing photo is the last one that shows a boy holding a photo of another child holding a photo and so on until a microscopic examination reveals the original boy on a beach decades ago. Completely wordless, the amazing illustrations, some double-spread convey the story and an imaginative journey underwater and back in time.

http://www.amazon.com/Flotsam-David-Wiesner/dp/0618194576/sr=1-1/qid=1166110744/ref=pd_bbs_sr_1/103-5407193-2823855?ie=UTF8&s=books

This Blog does have a tag feature. When you are in compose, it's called "labels." We could use as subject headings. See the bottom of this post.