Cape Cod Maritime Museum. They have a wide variety of things that you can do. They have artifacts and journals of the Colonial life aboard the Sparrow-Hawk.
You can also enjoy the Cape Cod ship building and how important boats and ships are in the history and journey of the past.
There is a little of everything to enjoy there for young or old. I bet there signal flags would be very interesting also.
Here’s a pic of IB Designs, USA banner spelling “Cape Cod”