Thanks for your speedy reply Philip!! Actually, the 24-120 IS the VR model. I checked this past weekend when she was here. I have another 24-120 that my son uses and it is NOT the VR model. So we may do better than I thought if I move her up to the D600.
I use the 18-200 on my D300S so I am sure she will be out-shooting me if she goes to the D600 and 24-120VR.