LONDON, ENGLAND - JULY 12:  Camilla, Duchess of Cornwall, Patron of Roald Dahl 100 visits her dream jar that has been created as part of the BFG Dream Jar Trail in St James Park on July 12, 2016 in London, England. The event was attended by nurses and children from Roald Dahl's Marvellous Children's Charity.  Her Royal Highness's Dream Jar has been designed by the renowned art director Michael Howells and shows The Duchess's dream of sharing the magic of books with the children of the world.  (Photo by Chris Jackson - WPA Pool/Getty Images)