It is rather a boring quilt right now, isn't it? I had to look at it for a while before I could even think of anything. Here goes.....
A small white, stopper border...think finishing at 1". Then a border of something that includes all three colors that are in the quilt. It could be flowers, baby dolls, owls, but just make sure the background is the same white as the stopper border. Then I would fussy cut some of the items from the final border and applique them to the center of each of the crosses or in the pink boxes.
I do hope you post your finished project.