I missed the bubble when I rated this, so I’m glad I came back to comment (and a bump). You caught a very wonderful moment and the smile shows she is having fun. However, that smile is really the story here and fill flash would have helped to bring out the details in her face. The good news is that some of the detail can be regained using advanced editing. The bad news is that it isn’t allowed for this challenge. You may want to revisit the cropping of this image also. I would like to see just a touch of her body to connect the arm/shoulder to her face.
The idea is good, it does a good job of identifying the title. The subject is not lit properly however, and it detracts from the photo quite a bit. Her entire face and arm are shadowed. I'd like to see this photo with some fill in flash. Don't be afraid to use flash outdoors, it will remove harsh shadows under the eyes, nose, lips and chin in mid day sun. It will also help in situations like this, where the sky is bright, but the subject itself looks as though they are in a shadow.