We recently took a GCA sponsored field trip to the Yellow River Game Ranch in Lilburn. "River" is a bit overstating the creek which runs along side the park. It was very crowded because GCA had over 200 children there, plus the general public was in there also. So, the thrill of being able to feed the animals diminished because the animals already had so much food at their feet they had no interest in more. But, the weather was gorgeous, it was an outside activity, and the girls seemed to love it.
The web site advised that you bring stale crackers, carrots and celery. I didn't read the web site until late at night the day before, so all I could find in our kitchen was crackers. Many of the animals would not eat crackers, but did eat the raw vegetables other people brought. There were tons of birds to see: