I think that can be done! We actually upgraded our kids 1 day, 2nd day free tickets to an AP. We knew we were coming back to Orlando the following year, so we decided it was worth it, because it is my kids fav park! We actually bought the kids tickets before we went online with my TD Visa Travel Rewards points. Then when I got there, I upgraded them to 1 year passes which cost me I think $24! Just ask at the front ticket counter, and they will take care of it for you!