grandmothers string is a magical invisible string that gives you the uncanny ability to randomly develop skills that give you the capability to skateboard, no sorry ROCKboard down the sides of waterfalls and jagged rocks, it also helps ytou find your way to a singing boy, baracaded in a cave inside of goblinland
any kindly, sweet old woman who will happily boost your self-esteem and write you letters and love you. tends to know lots of neat old songs and obscure, off-color jokes. generally much cooler and less scary than one's actual mother.