Hi Gina,
Any modifications to your current reservation need to be made via phone at
(407) 934-7639.
Whenever I consider switching resorts, I call (or check online) to get a price quote and check availability before making a decision. You'll want to ask if there is availability for your dates at Art of Animation and get a price quote for a family suite. If there is availability and you are okay with the price, simply ask for your current reservation to be modified to Art of Animation.
It's definitely possible to switch resorts as long as availability exists. I've done it many times!
Another tactic that you could use is to go online and book a new
package with Free Dining at Art of Animation. Then call at your earliest convenience to cancel your package at All-Star Movies resort. This would require putting down another deposit, then having the first reservation's deposit refunded.
Wishing you a wonderful vacation!