Add Decorations, Branches and Spiders
Cut small bat shapes or silhouettes of witches or other spooky shapes from cardboard and paint black, let dry. Or find the shapes on the internet and print out.
Adhere a branch or two in the middle of the moss with hot glue. You may have to hold it in place for a minute or two. Then use thread to hang a spider — or spiders — off the branches, or you can glue spiders to the base of the branch. Add a bit of the cotton spider webbing to a couple of the twig branches.