Very nice shot, is the circles sun glare on your lens, if so maybe a lens hood would of been a good idea to use or a different position so the glare would not be there, the two dots by the childs head is a little distracting but still the photo of the children is very nice.
Great capture and composition ... fun, loving moment. I agree though that the upper left is a glare that detracts from the wonderful image. I'm not sure in PP how to handle that exactly. I would love to see this B/W too with the background darkened almost to black ...