The background is too cluttered for me and while the girl has a pleasant smile, she is looking off camera and she was captured in an awkward stance that doesn't really reveal much about her enjoyment or the exhuberence of sliding. I think placing yourself at the bottom and timing the shot so you could catch the girl's expression in mid slide would have created a far more dynamic and interesting photo for the objective viewer.
I'm not much for receiving or giving comments, but since Candids are near and dear to my heart, I have decided to give comment on every entry in this challenge.
Children are sweet. They are also the most easiest targets for candids, and I would have loved to see something a bit more out of the comfort zone for this challenge in a candid then that of a child on a slide. She is darling though, but as a candid, in my opinion, it is a 4 photo.