Taken from a mine and locked in a wooden case By admin Taken from a mine and then locked up in a wooden case. Never released but used by students everyday. What am I? AnswerLead. A Lot More:You cannot take a picture of a man with a wooden legYou are locked in a car and have a hammerWe're five little items of an everyday sortFun Riddles About Common ObjectsPlease Help Me Find My Socks Brain TeaserMicrowave Riddles That Will heat up Your Brain and Leave you Spinning.