Great camera angle! I like the shot, but I wonder how it might look with a bit different color toning--there;'s just something about the toning that's not quite right to my eyes. I wonder how it would look with a slightly more natural look OR a more-radically altered look.
One of the nice things is the body position on the mom and the dad, as well as the kid's feet; the parents' outside and inside feet are in perfect complimentary position, with the all-important "heel lift"; without heel lift, people shown walking in photos look awkward or stiff and lifeless.
I know it is a minor nit, but you know, on the tree visible above the little girls' head/dad's shoulder area at 1 o'clock in the background is a small, black spot on the tree: I would definitely clone that black spot OUT. I might also consider cropping off maybe a very small amount at the top of the frame, just to see if it looks a bit better, playing against the out of focus foreground and low angle you chose.
I often look at photos for deeper,symbolic meaning and you know, this photo, from foreground to background has ONE repeating theme and element,and that is the presence of the support braces that guide the young trees; the parents in this case, supporting their young "sapling". There are six or so of those tree supports throughout the photo,and on a fine photo like this one, one that will probably be proudly on display for a few decades, I think the parents will look at the photo a lot of times, as will that little girl, and maybe they'll see the connection between the tree supports and the guidance of the parental hands. Since this is A Fall To Remember, I think you ought to tell them about the tree braces...just plant the seed.