Congrats on your trip. They have a great planning book just for kids. My 8 year old daughter loves it. It is Birnbaum's WDW for Kids by Kids 2005. I got mine at our local book store. It is well written for kids to use as a guide.
You might want to take a look at a book by Birnbaum's called Walt Disney World By Kids For Kids. It is the "official" Disney touring guide, so there are a lot of full color pictures and character graphics. It also contains park maps that are virtually identical to those handed out in the parks.
I bought one for my (then) 3 year old, even though I knew he wouldn't be able to read a word. He still loved the pictures and maps. I bet an 8 year old that has bever been to WDW would really enjoy it.
Well, if you want the "joke" response, there's only 1 ride at Walt Disney World, and that would be the Great Movie Ride. All the rest are attractions (there used to be two, but sadly, Mr Toad's Wild Ride is no longer with us)