Yes, this is challenge #11 - I skipped #10 for now. This challenge is from Hello With Kate - Pinwheel #3. She gives the tutorial in her blog. It calls for double sided paper and I couldn't find any in my stash, so I glued 2 pieces together with the Xyron. Tip: cut squares larger than you need unless you are good at lining up sticky paper.
I punched a circle to go under the bronze star brad to secure the tips of pinwheel. The background uses Sketch #8 from the Stars & Stamps blog.