OK, I love this idea DIY - Coasters from wine corks and old picture frames. This is a set of 4 coasters, 4 x 3 including the black, ceramic frame and thick. The cork area is x and the corks are about 1 cm higher than the frame.
Protect Your Wall from Stray Darts with This DIY Dartboard Cabinet Made of Wine Corks « MacGyverisms - instead of wine corks for those who don't drink wine, back dart board with cork squares (and paint Kentucky Blue.
DIY monogram cork letters I made one of these and it came out great. I used red wine corks and made the stained portion face outward which gave cool hues to the letter! Would also be great for a gift if you drink LOTS of wine.