R.L.
Make your own summer camp! Do crafts, teach the kids how to cook, sit under a leafy tree with popsicles and read, play board games, go for a hike, play in the sprinklers, make your own slip n' slide, explore your city (Atlanta has a great metro system, doesn't it?), do a community service project (especially one that involves making something, like toys for a children's hospital), sing goofy songs, and camp out in your back yard. Get your kids to help you plan a theme for each week.
For a bit more variety, take a couple of field trips. Learn a new sport. Look online and in your local Parents paper for free or low cost programs. Go to a concert or play in the park. Put on your own play (you can enlist the neighborhood kids). Build a puppet theater and put on a puppet show. Let your kids do the building and write the script. Learn to play a new musical instrument (the recorder is an easy instrument that most kids can learn to play passably with little effort). Make your own wacky instruments and form a garage band. Do cool science experiments, like making water rockets or building the classic baking soda and vinegar volcano. (You can get better ideas on line or pick up a book at the library).
Encourage your kids to ask their own questions and create their own experiments. Use your imagination, and encourage your kids to use theirs. Not only will you and they have a fun summer, but you'll be amazed at how much these types of activities will help them retain their educational skills over the summer, and excel in the new school year. If you notice, within the activities I listed you're reinforcing skills in reading, writing, math, science, performing arts, fine arts, home economics, and social consciousness. Your kids will have so much fun, they won't even realize they're learning!