The quilting is stitched along the seams of the pinwheels, which I made from a patchwork of a few different prints instead of a solid/print mixture like the calendar photo shows. I've got a big stash of small scraps that aren't good for much else but patchwork, and this seemed like a good excuse to use some of them up. The backs, which you can't see, are a plain white linen. A few of the scraps were linen and the rest are home dec fabrics, which, when paired with the linen backing and some quilt batting, make for a pretty sturdy coaster.
The next project in the book is a yoga mat bag. Seeing as I can barely keep my clumsy self standing somettimes this is clearly not a project that I'll have much use for. I'm going to try it out, but I think I'll try and modify it into something a little different.