To go w/ snake wreath.Snakes Under the Doormat: Spray-paint rubber snakes glossy black. Create various lengths of snakes by cutting them in two; arrange at the edge of a thick plastic-foam board and glue to the edges. Set the board underneath a doormat.
How to make a lawn ghost - this is a really inexpensive and adorable idea for Halloween lawn decorations. I might have to add faces to mine, but I'm thinking of something like this for my lawn this year.