Madmax at HalloweenForum has a great tutorial on how to make a Breathing Grave prop that you’re really going to dig (ridiculous pun intended) .  The effect is subtle, looks great, and when viewed at night with proper lighting, is sufficiently creepy.  When you see just how easy this prop is to craft, and how inexpensive it is, you’ll want to put them in front of all your tombstones!   Items needed to create this include: Vent Motor 11′ – 1×4 power supply 12VDC 300mA 1 Yard Burlap paint, 1 spray can or latex house paint 22″ threaded rod (1/4″) 6 nuts 6 lock washers 12 screws 2 Cams (1/2″ PVC with a cap)...