We are planning a last min four day trip to the Keys with our 17 year old twins and a 15 year very active son in two weeks. My husband and I spent two quick days in the keys several years ago but were content just eating, drinking, and sight seeing. Any ideas on things we can do with active teens? Is a side trip to the Everglades on the way south realistic? Maybe a day trip by ferry to Dry Tortugas? My husband also thought about renting a boat. Any ideas would be appreciated. We have been to 30a with them a dozen times and wanted them to give them a different experience than just sitting in a beach. They love anything that has to do with marine life or wildlife in general.