I made a cork wreath last fall. It’s huge and heavy and generally turned out ok. Lots of drilling holes, toothpicks and hot glue. I would recommend a smaller size if you decide to try it. A few have fallen out and it’s a bit delicate.
Years ago, I picked out some sentimental ones and framed a grouping in picture frames, again hot gluing (onto the glass). A similar frame idea could be used as a cork board.