For our first assignment we were asked to use Photoshop to collage an imaginary animal and a made-up landscape for it to exist in. Images used in the process were from photos depicting various textures, landscapes, faces, animals, and mechanical objects. My particular creature has the head of human, a body of a deer, and the tail of a fish. While my Photoshop skills are nothing amazing, the creature has a certain humor as it interacts with the landscape.
This would be a great project to introduce children to Photoshop. Instead of a random animal, maybe the students could create the creature based on what they would want to be if they were an animal.