We got our passes last October, premier passes for the adults but for the little one we got her seasonal pass as she was barely 39 inches tall and not able to ride that many rides. We are going back in May she is already 40 inches tall and is willing and ready to ride all the rides she can. We are thinking about upgrading her pass to the premier pass so she can get the 4pm express pass like we have. I'm guessing it will cost $330 bucks as that is the difference in price of the two passes? Also does that change the date for when her pass will expire or will it remain the same?