I think this works well in black and white. The original is largely monochrome - the boy is wearing grey pants and the shirt is shades of grey, the sky is grey overcast, and the sand is soft gold.
There was another person in the image. I have removed them (well, her) for purely compositional reasons. I think there is an artifact of that process still visible - something I missed this morning. I will have to look at this in more detail again.