You can't go to Disneyland without getting the autographs of your favorite Disney characters, right? Leaving without them is almost criminal, which is why it's always a good idea to keep a Sharpie on you at all times! But why not just a normal pen? Well, former Disney staffers have spilled the beans and confessed that the character costumes they wear can often obscure their vision. And this makes signing an autograph with a normal thin pen pretty difficult.
By offering these characters a Sharpie they can see more of, you should get a better and more legible autograph from them that you can keep for the rest of your life.