Diy Bat wreath: I particularly like this one because you can buy a regular wreath cheap and inexpensive and cut out paper bats using different halloween craft paper and hot glue them around the wreath. Tie a ribbon around the top to hang from the door.
DIY Christmas tree decoration Made with a paper cone and yarn. Dip the yarn in Elmer's glue and while it's wet wrap it around the cone. Let it dry completely and then remove it from the cone. Then decorate!