Did you think about trying a sepia tone? This black and white does nothing for me except revel a rather flat photo. Also, blurring the background (there is a modern jungle gym in the left background) would have given this an aged look.
Interesting angle. I like the fence in the background. The swing set (slide) is not so good in the background. B&W is fitting here. Good take on the challenge. Just a little bit blurry.