In July I threw a huge Harry Potter party to celebrate the release of the last movie. My little sister went as Luna, so I offered to help her with her earrings.
Not too many materials needed: white, green & a magenta-reddish Sculpey (polymer clay), and earring hooks.
After about 20 mins in the oven:
My little sister as Luna Lovegood (complete with radish earrings & spectraspecs):
I just made another set for a personal swap with 85%confusion: