I also picture this application useful in areas such as writing character traits, telling import parts in a chapter, or even recording quick facts that were learned about a topic. I like to think of this app as a good one for quick projects to share knowledge and understanding. It is without a doubt not for upper level thinking, but it does make for a more engaging experience in the classroom.
Another set of examples is from Mrs. Abbs' first grade classroom. Her students used the stickers in Pic Collage to demonstrate subtraction story problems. I hadn't even thought of using the objects that were already available in Pic Collage for the math manipulatives.