We did this with my {at the time} 8 & 4 year old and they loved it far more than I thought they would. It's free, which is right in my price range. They give you a cell phone communicator thingy that you get clues with and have to try and find things in the different countries, but the really cool thing is that by finding the clue or answering the mystery, 'special' things happen around the countries. I don't want to spoil it for you, but for an example things might move or make a sound or suddenly appear that you would never notice or be able to even see as a regular guest. I also think it's different each time you do it, so you can have different adventures if you go to EPCOT again.
