Hi Kelly,
You should be able to upgrade your base tickets to
Annual Passes. As long as the tickets have valid park admissions left on them, you can upgrade them at any Guest Relations location. You can only upgrade one ticket per Annual Pass. I know that sounds a little odd, but it means that you can't take two different tickets and apply them to the purchase of one Annual Pass.
Enjoy those Annual Passes if you do decide to upgrade. Be sure to visit the
Passholder Pages to keep up with available discounts, and be careful, those passes make it very easy to plan more trips to Walt Disney World!
Thanks for stopping by the Disney Parks Moms Panel with your question.
Wishing you many magical vacations,
Amy H