This is a really fun place for the family. The museum entrance is an actual non-functioning subway entrance built in the 1930s. Inside you'll be greeted by a ticket-seller sitting inside an old booth. Purchase tickets there (adult tickets are $5 and children and senior tickets are $3).
On the immediate left is the gift store loaded with subway paraphernalia, including T-shirts for all sizes, umbrellas, stuffed bears, cuff links, purses, and many railway-oriented toys for children.
Walk into the museum/subway station and pass old turnstiles that vary in age. A sort of interactive tunnel runs along the side that details the creation of the Brooklyn Bridge and shows how it was a real sacrifice and a huge accomplishment for the people of the city. There is also a lot of history about the trolleys that once ruled the city streets.
In the back they showcase the bus system with maps along the walls and the front of a bus that children can sit in to play bus driver.
Go farther downstairs to see the old subway cars. There are two tracks, and the old cars are lined up. The cars are from all different eras, and you can walk through each one of them, experiencing what it would be like to ride the rails throughout the last 100 years. The oldest cars have woven straw seats, and the first air-conditioners were little fans hanging from the ceiling. The ‘50s industrial boom made cars more functional and sleek. From then on, you might recognize many of the subway cars as they might still be running!
This is a really fun place to hang out for a few hours. It's close to downtown Brooklyn, including Smith Street.