Paper plate skeleton. My favorite kind of craft...one that does not require a trip to the craft store. And I'm thinking if you could find white plastic plates, this would be fun to hang from the trees outside.
Halloween Kids Craft Idea: String up a Ghoulish Garland. Difficulty level = Medium to Hard depending on child's age. You could always skip a few steps or even make it a Kid & Parent Duo Craft Project :) AllYou.com