Here's my version of the cute & easy hair clip.
First, I take the flowers apart (I also buy the ones from Walmart. I think 12 for $1.77).
Instead of tossing out all of the supporting plastics, I keep the one closest to the base, and insert it before I insert the last set of petals. I use scrapbooking brads for the center. (I get them when they go on sale, you can get like 50 of them for $0.99).
I like the fact that when you are done, you get a puffy flower instead of a flat one