After stumbling on a piece of it in a forum somewhere, I dug around until I'd read everything I could find. The story is lovely and inspiring, and I thought that I'd share it as widely as possible. I've retold it here in the form of a children's story, suitable for reading out loud to a child while watching the presentation..
Be sure your sound is turned on! To view full-screen (which will make the text easier to read), click the in the lower-right of the media box below.