Waterfall by Nevit Dilmen http://www.creativecommons.org/licenses/by-sa/3.0/
I tried to upload this as an image and it was static–no movement. I tried it as a movie and it didn’t upload at all. Finally I tried to upload it as a link and of course it worked (see link above), but I am going to come back to this and try to embed this if I can find some code. Found it!
Here is a site that explores all models of inquiry, including Barbara Stripling’s earliest incarnation.