I would cut the panel apart, leaving the thin yellow frame and make them the center of a patchwork square. Or you could make them into the center of a star and make a patchwork sashing. I think that would be cute.
I wasn't able to get any info on what size each square is but it would be easy enough to adjust.
It is a super cute panel. I look forward to hearing the other suggestions and then seeing what you decide to do. Which color did you choose?