Originally Posted by Yarn or Fabric
Will it indicate a pin or needle on the floor? I'm not sure how sensitive it is. But that would be my only guess as to why she would have it in her sewing cabinet... to find lost pins on the floor or in your quilt....
I vote for this answer! I always inspect Project Linus quilts that are donated, and sometimes I find pins that were overlooked. It is dangerous to deliver a quilt to a child that might have a hidden pin.