If you are looking to have the wall as the art piece, then photograph it alone.
If the people are the main subjects, then use your wall as though you were in a studio. The people are too small in a couple of cases.
The other thing, bring em out about 8-10 feet, and use a shallow DOF, that would be a neat effect on the background.
Now that you have the basic blah studio kind of shots, now, you can go ahead and tell them to act out some kind of scene, angry, cool, fun, jumping, playing around, goofy, you get what I mean.
Love to have that wall!!!!!!!