I just got one of the Clover Kanzashi Flower Makers -- the small round petal -- and it was incredibly easy to make this flower:
The center is a vintage button that covers the center raw edges of the petals. For the back (not shown) I cut an oval of felt and glued it on (I use either Aleene's Tacky Glue, or their Washable glue). This covers up the raw edges from the back, and stabilizes the flower petals and provides a platform onto which to glue a pin back.
The fabric is a chirimen crepe (synthetic) from a vintage kimono which I got on etsy from vintagemagnet. It has a great hand for these flowers...not too soft, not too stiff.
The flower itself took about 10 minutes to assemble, then a little more time to glue button and bottom felt on.
This was so easy, I only have 1 tip to add: follow the instruction's pictures when you are gathering the flower petal...when pulling the thread to make the pleats, keep your fingers on the thread, and don't hold the petal and attempt to help it along...it does better on its own!