Hello, Mindy,
If I were doing the same thing, I would take a bus from Disney's Animal Kingdom to Disney's Animal Kingdom Lodge since they are located so close to one another. Once you arrive at the resort, you simply need to walk to the Downtown Disney bus stop (it will be located close by) and wait for that bus. I would allow yourself at least an hour in travel time.
If you are waiting for the bus for Disney's Animal Kingdom Lodge and you see the bus for
Disney's Saratoga Spring Resort & Spa and can catch it instead, it is another option. You can take it instead and get off at the Congress Park bus stop. From there, you can walk to Downtown Disney and
T-REX. If you click on the link for the restaurant and/or resort, there is a map included that you can look at to see the path between the resort and the restaurant. Again, I'd still allow an hour in travel time.
Wishing you a great Disney day! Please let us know if you have any further questions. -
Kara