Nice moment captured!
The image looks a little on the yellow side.
You seem to have cut off the older girls fingers.
The composition is not bad (good job not centering them), however I am left with a feeling of wanting to know more. That can be accomplished by either having both of them looking at the camera or as both of their gazes are fixed on something off camera, letting us see a bit more of what is going on might work (might not, depends on what is on the table)
I would much prefer having them looking at the camera as the key to many portraits is getting the eyes in them, and getting them sharp