Many museums offer ways for kids to explore collections from home. Here are links to the Met and the Smithsonian’s offerings, as well as a roundup of virtual museum tours from around the world.
https://www.metmuseum.org/art/online-features/metkids/
https://www.travelandleisure.com/attractions/museums-galleries/museums-with-virtual-tours
And if you’re looking for another kind of museum escape to share with your children, The Mixed-Up Files of Mrs. Basil E. Frankweiler is a great option for a family read aloud!