Welcome to the Disney Parks Moms Panel, Shannon!
Thank you so much for reaching out to us! I am happy to help clarify your question today.
When staying at an official, on-property, Walt Disney World® Resort Hotel, in your case Disney's Art of Animation Resort,
Disney Bus Transportation will take you directly to the bus stop near the entrance of Magic Kingdom. There is no bus service to the Transportation and Ticket Center for official resort hotels.
The hotels and resorts that do have buses providing service to the TTC are good neighbor resorts that are not officially part of the Walt Disney World® family of resort hotels. Those buses deliver guests straight to the TTC where the guest will than transfer to the monorail, or a bus, depending on where they want to go. As a Walt Disney World® Resort Hotel guest, you will have bus service to all theme parks directly - no need to transfer at the TTC.
So while resort buses do bring guests to the TTC, it is for off-property resorst and hotels. I hope that helps, Shannon! Please let us know if we can be of any additional assistance in helping you plan your transportation needs. You can also select the highlighted link above for more information and an interactive map of bus stops.
Faith