Tin Foil/Butterfly Hanging/minimum.6. NANA BELLS Originally used to keep track of cattle herds, these handcrafted bells are distinctive from any other types of bells from across the globe. Due to a secret family formula that is used to smelt various metals and attaching a hand hewed wood clapper the tune these bells make is uniquely melodic. For generations the formula has been passed on from one family member to the next.