I took the "Backstage at Animal Kingdom" tour a couple of years ago. It was around $50 or $60. It was great, we learned a lot about how Animal Kingdom takes care of the animals and saw the elephant and giraffe enclosures. It was a horribly cold and rainy day so they drove us from enclosure to enclosure instead of having us walk in the rain. Definately a worthwhile experience if you're in to the animals.