Hello All: Throwing out there a question 7 different disney employees couldn't answer on the phone. They didn't know the answer. We have 2 child annual pass voucers from several years back. We are going to Disney in August and want to do one of two things. Either upgrade the annual vouchers to premium annual vouchers for the kids or possibly upgrade them to adult premium annuals. They are unused vouchers. The BIG question is would I pay the difference in price of a current annual to a premium annual? OR would I pay the difference of what I paid back then to the current cost of a premium annual? Someone please help ASAP.