Alright, here goes.
The composition of this shot is mediocre at best, bad at worst. The blocking of the mother and son is awkwardly shifted to the right, leaving a bit of negative space on the left that leaves the frame somewhat unbalanced. The angle you have selected is also fairly uninteresting: a long mostly-side-angle shot with the rather large gift awkwardly obscuring the boy on the right, not to mention framed a little bit too high (the boy has too much headroom). If he is supposed to be the representation of the "joy" in this frame, it doesn't do well to push him off to the side as you have done, he doesn't come across as particularly important or significant. A frame like this calls for a tighter shot at a much more expressive angle.
The lighting might be passable if you were attempting a nighttime shot, but in context of the theme and what I assume you're trying to get across, it works against the composition. It's far too dark to express any kind of sense of joy or elation. The window in particular calls for some specialty lighting (like a storefront window), or at the very least, some illumination to separate it from the foreground. As it is, it's so darkly lit that the mother's hair blends in to it, and the window/brick reflections are somewhat distracting.
I wrote a short poem and you took it literally. Le wut?!
