I have the Magic Kingdom game and the board is layed out like MK in WDW. I didn't pay close attention to the castle description, so I can't remember if they called it by the wrong name.
Anyway, its a board game. You pull 5 attraction cards (1 from each land) and move your token around MK to visit each of your 5 attractions. The first person back to the entrance wins. Along the way you can collect Mickey and Donald's autograph, and by having them you can stop another player from pulling an 'even't card. An event card is similar to Monopoly's Chance. It may send you to another attraction, to City Hall, to eat lunch, take another turn, etc.
Its a lot of fun. I couldn't wait until Christmas to play it, so we opened it for game night last weekend. My 9 yr son loves it. We paid $19.99 (regular price, no sale) at Toys R Us.