Are there family members that would appreciate the history behind these blocks? If there are, then you might consider having them professionally framed. I just priced 10 inch square frames at "my framer guy" and it would run me about $40 each ~ w/ the fabric square laying on mat board..
If not, then, I gotta admit that i would be heading to a quilt store looking for some fabrics to add sashes between the squares and then putting it into a quilt.
I probably wouldn't wash it after completing it though.....
I also find it a tremendous honor to finish a quilt top/blocks that someone so lovingly put together, but for whatever reason wasn't able to finish the project.