Well, LiL_KRN_YUNA didn't use Sculpey, but Crayola Model Magic. This stuff is light, fluffy and very good to use. It takes about a day to dry, but ish good. If you want something more solid, try Paper Clay. You don't need to put it in an oven or anything. It dries like a light wood.
Dragon*Con '11- Sansa Stark, Little Sister, Belldandy, Rainbow Dash