I like the idea that you are taking them to bring someone else to the airport or picking someone up at the airport and then telling them they are going to Disney World.
I look forward to hearing what you end up doing.
Our kids know we are going in the fall but we didn’t tell them the exact day. We leave at 6:45am so we are going to wake them up at 4ish and set the clocks ahead and tell them its time for school. Then tell them the we are really going to DisneyWorld right NOW!!!