It wouldn’t be a trip to the naval capital of the United States without a visit to Nauticus. They’ve got a great museum that focuses on sea and naval life. Their biggest attraction, the Battleship Wisconsin, is a huge WWII battleship that’s free to board. Basically you can wander about it on your own our take an audio tour. On the animal side they’ve got a lot of hands-on exhibits. You can touch hermit crabs, star fish, horseshoe crabs, and other creatures that are found in the Chesapeake Bay.