We also noticed another nest close by:
I took the kids up after work to check out the birds, and they thought they were pretty cool.
They were also happy to participate in another activity behind the visitor center:
For their efforts, the kids received solar observer certificates, and we took a photo with the park volunteer, Tom.
After some browsing in the book store and cafe and gift shop, we went back out to watch the birds. The kids were much more patient than I expected, and it was pretty cool seeing what mama bird was bringing back to her babies. It looked like she was catching a lot of moths, but also grasshoppers and flies.
I knew the kids were having a good time when they asked me to be their mama bird and feed them. I hope they aren't picky eaters!