The National World War II Museum in New Orleans, LA is closed to the public right now, but you may want to take advantage of their virtual field trips. While they aren’t free, they do have a “Buy 4, get Five” offer.
Looks like there are a wide variety of programs for K-12 classrooms, library patrons, lifelong learning audiences such as senior centers, assisted living facilities, etc. These programs may be a great way to stay connected while utilizing social distancing as much as possible. 
For a listing of field trips and booking information, please click on the link below:
Children's Author - Maria Bostian 