I made a bouquet of pincushions over Labor Day weekend. I used this pattern from Whip Up — it was really easy. Here are three of them:
They are 100% cotton — wool felt probably would make a nicer pincushion, but cotton was what I had. I stuffed them with wool roving left over from my attempts to learn how to spin. They are very cute, but also very functional. The flat shape makes them very stable and unlikely to tip over.