My dds have tried some science programs at the Denver Museum of Nature and Science and usually found the ones for the elementary crowd to be kind of young and lacking in depth. They weren't bad, just not really geared toward kids who want more than surface info. They did enjoy marine biologist and zoologist for a day classes at the Denver aquarium.
We don't live in Denver, so it was a bit of a drive and I'm not as sure about ongoing classes like you describe since I wouldn't have been able or willing to make weekly or more frequent drives there for a class. Like others, I suspect that you'd need to be near a big city for any likelihood of finding the types of programs you have now. The question then becomes whether they are as deep and challenging give her age and that programs geared toward that age often come across as shallow or patronizing to kids who want to be talked to like little adults.
