I cut the charm squares in half, so they were 2.5 x 5 and sewed them into strips of 8. Then I trimmed each strip down to 4 7/8 x 15 7/8. I had some white fabric that has a subtle wood-grain pattern, and cut it into 16 inch squares. Using squares of the main star burst fabric as corner anchors, I pieced the top together, forming a colorful grid around the white squares.
For now, it's fun to look at while I work on other projects.