Nancy Jean Costigan's Rubber Ball

Origin
Nancy Jean Costigan (1929 - 1934) was only five years old when she was brutally murdered by her neighbor, Lawrence Stone. She was discovered to have been shoved down her neighbor's cellar, causing a skull injury knocking her unconscious. Thinking she was dead Stone killed her by placing her in his furnace. Police discovered the body after finding her ball in the cellar.

Effects
Will roll and stop near hidden passageways, doors, etc. Covering a trap  door with a rug then placing the ball in the far corner it rolled over to where the trap door was and rested on it