For the first timers (and repeat visitors), our top 3 recs are,

1. Georgia Aquarium

2. Atlanta Botanical Garden

3. World of Coke

There are 3 great trails and hikes near us in northern Atlanta,

1. Vickery Creek trail - Has a massive waterfall.

2. East Palisades trail - Has a bamboo forest (on marker EP 26).

3. Kennesaw mountain - Has great views of the city.