What is a nursing necklace..? I know that it is supposed to be used to help keep the LO focused so they aren't trying to looking every which way while nursing. But what are they made out of, is there anything to avoid, how many beads, what size and material, what kind of string is used..??? I've never seen one before and only recently heard of them. I'm going to look them up but I was told that many moms make their own. I'm not to crafty so any details would very appreciated.