Amazing collection of birds, crustaceans, and dinosaurs
The Delaware Museum of Natural History was founded in the 1950's by the famous DuPont family of Delaware and focuses on sea life and sea bird, a natural choice considering you're in Delaware, one of the most scenic coastal states on the Atlantic seaboard. The museum is perhaps most famous for its collection of birds...over 100,000 of them! In fact, DuPont, the founder of the museum, was an avid naturist and explorer and discovered over a dozen species of birds around the world.
But let's be real...the museum is not just about birds and seashells. They also have exhibits on dinosaurs, mammals, and a really impressive giant squid hanging from the ceiling! The museum also has the usual educational displays which give the kids (and adults!) a bit more info about biology, evolution, and history's great naturalists like Charles Darwin. There are also two nature trails that circle the woodlands and wetlands behind the museum. I'd recommend taking the red trail which takes you on a walkway over the wetlands.