On to the Photolife:
Think about the way you take pictures of kids. Do you shoot them straight on with a smile? Are you shooting down at them with them looking up? It's a standard take for adults. I like to get some pictures like that, because it's the most common way I see them.
OR, if you want something with more impact get below them and shoot UP. Let them get crazy. Don't forget to get close and fill the frame with their wackiness.
Application to writing? It can be good to include different perspectives of your characters--different aspects of who they are and how others perceive them. I like to include some of the funny things they do. It can infuse your writing with humor, and every book needs a little humor--even the most serious or maybe especially those.