Believe it or not, PDK is a great place to take your kids! It's easy to get to, and you can watch planes land and take off all day. The airport has a playground (pictured above) which has airplane-themed play structures. Just beyond the park (over the chain-link fence) are the airplanes - some parked, some taxiing, and some taking off. You can get a closer view from an observation deck just past the playground.
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We went for our second visit with some friends, and the children played for over three hours (including lunch). They had lots of fun pretending to fly planes while watching the real ones fly off into the sky. There is a metal gazebo with picnic tables (and more picnic tables under some trees) and bathrooms behind the park, so it's a great free outing. If you don't want to pack a lunch, you can eat at the Downwind Restaurant overlooking the runway. It's a bit pricey ($5.00 for kids meals, not including a drink), but the food is decent.
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You really can't go watch planes at Hartsfield anymore, unless you want to go to the top of the parking garage. But DeKalb Peachtree Airport has plenty of planes to see - go check it out!
