I don't often comment on photos. The first thing that touched me was the overall play of colors. there is something very nice about this photo. The expression on the kid's face is different. However, the focus is off and this sort of takes something away from the image.
To answer your question if you should present it to your sister, well, only you can answer that. Do you want your sister to have it? Does it replicate what you felt when you took the image?