Seems oversharpened. Nice composition. Not sure I would have gone with a sepia on this. I'm guessing that the original was a little dull or blown out. I would have played with the monochrome channel mixer to get the levels on a normal black and white just right.
This almost works. The strong light on the water is what is killing this shot. The kids in the weeds/grass is very nice. The light is just too strong on the water. I do think it would of been better in color also.
little soft in focus, and overexposed in the reflections on the water. it's a tough balance without the ability to dodge and burn. try using the gamma correction on the original, and maybe decrease the contrast a bit. As it stands the flare draws away from the kids (who are doing a great job of posing by the way. nice shot.
I like borders now, but I wouldn't use black with sepia - too overpowering.