Good for

Actually open on Sunday

Sunday is the day Delaware's museums are most likely to be shut. These ones aren't.

Worked out from the opening days each place publishes, so a place whose hours I have not got is absent rather than assumed open. Holiday weekends are their own problem.

7 places on this list

New Castle County

Brandywine Zoo
Zoo · Wilmington
Delaware Art Museum
Museum · Wilmington
Delaware Museum of Nature & Science
Nature center · Wilmington
Hagley Museum and Library
Museum · Wilmington
New Castle Court House Museum
Museum · New Castle
Winterthur Museum, Garden & Library
Museum · Winterthur

Kent County

Biggs Museum of American Art
Museum · Dover

Other things to look for

Somewhere dry when it rains — Rainy-Day Things to Do in Delaware With Kids
A playground with a bathroom — Delaware Playgrounds With Restrooms
Go somewhere without buying a ticket — Free Things to Do in Delaware
Somewhere that works with a small child — Things to Do in Delaware With Toddlers
Shade in August — Delaware Parks With Shade
A drink where the dog can come — Dog-Friendly Breweries & Wineries in Delaware

Know someone who'd find this useful? Send it their way. It might save them a wasted trip, give a dog somewhere to run, or help keep the kids busy when it rains.