There is sooooo much to do in St. Augustine! Lots of shops, historic forts, ghost tours, excellent food, and lots of attractions including the Alligator Farm, St. Augustine Lighthouse, and a pirate ship. Only about 45 minutes from our house / recommended hotels. Great place to make a day out of.
We love the zoo! Feed the giraffes, pet sting rays, and check out the tiger walks. There are a few different places to eat (The only by the Jaguars is pretty good), and the weather will be perfect for the animals to be out and about. The train ride is worth the couple dollars extra so you can see the other side of certain exhibits, like the elephants, that you can't see when walking and it happens to be Luke's favorite thing to do.
Bringing kids? This is a great little spot we take Lilly & Luke! There is a water park, 2 mini golf courses, laser tag, arcade, batting cages, and go-carts. Spend a couple hours playing games, or half a day splashing around. Keeps kids busy rain or shine.