This leaves me with the thought that the future is closer than we think. I like your arrangement here, although I think that the little boy should be more in focus. Perhaps a shot a little further away with a good DOF then cropped in a bit would make a difference. I guess what I'm trying to say is that all three of them need to be clearly seen in this arrangement, and the boy is just a touch too soft.
The rest of the composition with the water and the arrangement you took of the rocks is really good.
"I never looked for it, gave it no name; yet I knew it always, when the gift of peace came. I stood quite still for the moment that it lasted...Then the light shifted slightly and the moment passed, leaving me...with the lasting echo of its presence.." Diana Gabaldon
Unusual picture, looks like Mum got wet feet wading out to the rocks :) Only advice I could offer would be to bring up the contrast/colour of the rocks in photoshop as they seem a bit dark. Or if your feeling realy adventurous change the sky as it seems a little plain. Nice picture, good composition, I like the boys natural expression :-)