While we visited the Japanese Pavilion we picked a pearl. You purchase an oyster, which you pick out of one of the 2 water tanks and the lady shucks it right in front of you. Once she takes it out of the oyster she cleans it, measures it and places it in a baggy for you take with you. Of course they sell jewelry that you can have it set in but I bought the girls a carriage necklace off Ebay for their pearls. It was a neat experience and one that would be fun to do again.