MUSCAT, MUSCAT - NOVEMBER 06:  Camilla, Duchess of Cornwall completes a puzzle with a young girl as she visits Oman's first Children's public library on the third day of a Royal tour of Oman on November 6, 2016 in Muscat, Oman. Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall are on a Royal tour of the Middle East starting with Oman, then the UAE and finally Bahrain.  (Photo by Chris Jackson/Getty Images)