L.H.
The aquarium is incredible. Beluga whales are beautiful. Centennial Park is also nice and when we visited years ago they had patriotic music playing in sync with fountains.
If you're taking I-20 the whole way you'll go through Longview, Shreveport, Vicksburg, Meridian, Birmingham and Atlanta. Shreveport has a nice science museum. Monroe is where Duck Dynasty store is located if that appeals to you. Vicksburg has a lot of civil war history and a beautiful cemetery if that's interesting to you. Meridian doesn't have a lot to offer and if you decide to stay there pm me because my husband's family lives there so I can tell you safe hotels to stay. Birmingham Zoo is a really nice zoo. One thing we try to do when we travel is taste food from the area. If you've never experienced a muffalata or beignets or crawfish Louisiana is a great place to experience those.
Have fun and I also use trip advisor a lot when traveling. I frequent the route on I-20 so if I can help, just send me a message.
Blessings!
L.