This is on the list to build for Halloween. It only needs water and looks pretty good. But…the 12 jet pond fog machine it uses (ultrasonic water vaporizer) runs about $200. You can get a 1 jet with LEDs for 10-20…so maybe I scale this down in size for now. http://www.instructables.com/id/Water-Only-Fog-Machine-No-Dry-Ice-No-Fog-Juice/