So when I came back I decided to make it so. I used some grey fabric (about 15" x 17" what I had laying around) and some scraps of various blues (with doublesided fusable web).
Turned out pretty great!!! (I need to trim a little off the bottom to make it less rainbow like down there).
Now for how to quilt it to secure all those little tiny pieces? I tested out two ways, and I think I've decided to go with the first way, which is to sew around each square rather than free motion quilting over them.
I have no idea what this will become... a doll quilt? A pillow? It's fun either way!