Isn't that a clever idea? I had been eyeing the ceiling medallions at Lowe's a few years back when I was looking at light fixtures. Old school, plaster medallions are super heavy but the ones at Lowes are a very light plastic. They would be perfect for a project like this!
When it comes to hanging these, consider layering a few of them as they did here for added interest. Mindy has written about the beauty of layering frames. The same thing applies here!
images via The Pink Chalkboard