I've used a pendulum to find lost items before. One particular item I had gone into everyroom and asked if it was in here, the pendulum swung no until I got to a room where it swung yes. I searched the room unable to find it. I sat down on the bed and I asked the pendulum if it could point out where it was. It started swinging from side to side in a wide arc, I searched along the swingline until I found the item, it was right beneath where I was sitting between the mattress and base.