Pinwheel Block

The fourth Sampler in Leila's Skills Builder online course is the Pinwheel design. It can be in two colours, or a mixture. I was going to go for a mixture, but decided it would be quicker to just have one colour with white. I haven't been buying any new fabric for this course; it seems silly to buy more when I can just use what is in my mish mash stash of fabrics. The problem is that they are not all 100% cotton - some are not cotton at all! I've picked them up at opshops, Guild remnant bins, and so on.
The white fabric I used to make this block is a mystery to me. I don't think it is cotton because the weave is very wide (is that the right word) and it frays very easily. But I have a heap of it, so I figured I may as well use it. Not a good idea! But I got there in the end. The blue floral fabric was definitely cotton and much easier to worth. Ah well, as I've said before, it is all a learning process. You may notice in the photo that I machined a zig zag edge around the block - this is to stop it fraying any more. My white squares blocks ended up being a bit smaller than the pinwheels because threads kept peeling off the edge every time I handled them!
All in all, I'm rather pleased with my first Pinwheel effort. Oh I know the corners and things don't match perfectly, but it only took me one afternoon to make it from start to finish, and it was fun. Mind you, I don't know that I would care to make a whole quilt out of Pinwheel blocks - that would be asking too much, even if I used the correct cotton fabric!