We did this right on the bubble of our kids outgrowing it. They were 11 and 9. It was great fun!
You get your badge near Town Hall on Main Street and the group starts out as though they have to clean up the place before the call comes in to save the day.
You get a map and clues to figure out where to go next, doing funny stuff along the way, lots of trivia and interaction, before you end up with a special private meet and greet with characters. Then you go with those characters to a ride or show at the end of the tour. Ours was front row with Pan and Wendy to watch Mickey's Philharmagic.
Our very old video: