A fun benefit was collecting the Carsland buttons. These are only found in Carsland from the cast members in the shops and sometimes the cast members walking around. Most will make you answer Cars trivia correctly or even general Disney questions.
There are a total of 6 buttons to find and collect. Sadly I could not find one of them. Everyone was out so that button will have to wait until my next trip or until I can find someone willing to find me one on their next trip.