 On arrival, all guests received a purple hamper with snacks put together by Jamie Oliver.For the occasion, the palace grounds were transformed into scenes from children's books including places like the Hundred Acre Wood and 80 costumed characters, and a model of the BFG sitting at a huge piano.The grounds also had an author's corner, where authors like J. K. Rowling, Philip Pullman, Eric Hill and Raymond Briggs read from their books and signed autographs.