i see a lot of great photo opportunities here, but this one misses. if you started by pulling them away from the wall so that there was less shadow that would be a tremendous help.
This is a cute pose! It might improve the shot to get rid of the flash and instead take these two wonderful boys outside under an overcast sky--or use the flas outside where it won't cast that shadow on the wall. Good luck!
Funny, but could have had a better execution. Find a way to get rid of the shadow from the child to the right. Also, maybe pose them so we can see their faces more.
A great idea for the photo. Seeing as it is a set up shot, it would probably be stronger if the time was taken to perfect the symmetry, and work on lighting to eliminate the harsh shadow.