We just did this tour last week with DD8. We all really enjoyed it. Our guide, Ben, made a real effort to engage DD, as she was the only child. She loved feeding the sturgeon, seeing the baby alligators, the ladybug release, tasting the cucumbers, talking about her science fair project, seeing the bugs (through glass) lots of it! Plus she just loved being back there, watching the boat ride go by. (She waved at a few.) We are actually going to try some hydroponic gardening at home after learning about it on the tour. DD loves gardening, so that helps.
BTW, none of us were asked for ID, which is a good thing, as I left my license home (dumb). I didn't even know they might ask for it. Neither grown-ups nor DD was asked for any sort of ID other than my credit card. Plus, really the 9/11 hijackers got driver's licenses, what does showing ID accomplish for security? (Off soapbox)
Enjoy the tour. It was fun!