I did the Keys to the Kingdom last year. It was the highlight of my trip. You take a tour of the Magic Kingdom, learning some interesting history and trivia. You'll visit the backlot where the floats are kept, learn about how Thunder Mountain is supplied with water, and tour the "underground" tunnels. Lunch is included in the price, as well as a couple of rides, which again includes lots of interesting tidbits of information. Young children are not allowed on the tour so as not to ruin the magic. Highly recommend it.