The biodome is great fun for kids (and kids at heart). Think of it like an indoor zoo, but more awesome... if zoos aren't your thing though, steer clear. It has four distinct sections, which are created to imitate the natural ecosystem. So the rainforest is hot and muggy while the laurent forest is a nice comfortable fall temperature. The antarctic section is behind glass, which is kind of sad, I'd rather be cold than try and take pictures of the adorable penguins through glass. While its not large as far as zoos go, it was a unique experience, and one I'd go see again.
I'm only sad because the otters were asleep :(