1200 Year Old Tin-Can Telephone Made From Gourds and Twine

 


http://www.smithsonianmag.com/ideas-innovations/Theres-a-1200-year-old-Phone-in-the-Smithsonian-Collections-231152081.html

It looks like people in the year 813 AD were playing around with materials and made a "tin-can" telephone from natural materials!