Woweeeeeeee!!!!!!!! the lady works faaaaaaast!!!!!
Outer border ... do you have more of the dark blue that you used in the blocks?
Or if you don't have enough of it, do you have a blue print about the same colour you want to use up.
Check with the Day Centre, as to how large they want them. This may already be at the size they want, or close to it!
OKSGlad ... I like your double needle quilting idea! Must remember that ... twice the work done, in one swoop!