A cute shot, though it's got some problems. Highlights on their faces are a little overexposed. The ridge right behind the upper boys head tends to draw the eye. A wide aperture could have helped to blur it so as to not be as distracting, or a perhaps a steeper perspective, so that it was not in the picture. Also, your file size is a lot smaller than was allowed. It's only 84k and you could have used up to 150k for this challenge. You have likely lost some clarity and detail to JPEG compression, though I do not see any obvious artifacts. Check the JPEG compression settings in your image editor and always try to save as close to the limit for a challenge as you can get it without going over.
This seems too "snapshot" like to me. The focus is not sharp and the background is distracting, especially the two lines that run your your son's head. Using a shallower depth of field might help by rendering the background blurrier.
Cute boys. The face on the upper boy is a little over-exposed. The background is also a little distracting, the photo would be greatly improved by adding a shallower DOF so the background was not in focus.
I find it hard to comment on pictures that obviously mean a lot more to you than to the random viewer/voter. I'll just talk about technicals. focus is where it belongs. exposure is a tad too bright for the skin. good control of the reflection in the glasses. from a composition POV: too bad you cut off the one foot on the right side. I think going to landscape would have helped controlling the background better. the band of shrubs take away the focus from the boys.