NOTE: As of this posting, September 2012, users can sign up for a premium account for FREE. I highly recommend that you do this as this is certain to become a paid feature in the future!
The collage option is a quick and easy wait to put a lot of different photos together. These photos could be related to a theme for math (geometric shapes), science (stages of an experiment), or even character counts (showing different examples of one trait).
You also can upload a photo for editing, and this is where Ribbet REALLY shines. I chose to edit one of the stock photos of a clown fish:
USE IT TODAY!