We rank this right up there with some of the top tours of the Mile Marker Zero City. Also try the Trolley Tour, Commotion on the Ocean, Little White House Museum, and a tour of the Truman Annex. Just about everything that we did in Key West was also perfect for children. Not sure why the city has a questionable reputation regarding kids, as everything was exceptional during our Florida Keys Vacation at the Galleon Resort.
It will take you about an hour, but perhaps longer if you love the historic stuff like we do. Make sure you stop by Heritage House & Cottage and the Fort East Martello Museum, two other notable spots you will enjoy.
Not as fun as the catamaran boat rides, but a very good historic review. Small children will probably want to skip this one. Best for older adults that have a big appreciation of historic tributes.