1. Cut 2 pieces of poster board with a zig-zag edge. Attach to the door with several glue dots.
2. Attach dinner-sized paper plates to the doors as eyes, and black cake plates to the eyes as pupils. Attach to the door with glue dots.
3. Create a crooked mouth with thick painter's tape.
4. Use either rectangular plates or just pieces of card stock or cardboard as the teeth. Adhere them just below the mouth with glue dots.