Adventurer's Park is a small amusement park in Gravesend, close to Coney Island but aimed more squarely at younger children. The rides are modest rather than spectacular: bumper cars, a Ferris wheel, a merry-go-round, tea cups, go-karts, mini golf, and a few other fairground staples.
It is most useful for families who need an easy half-day activity in southern Brooklyn. Treat it as a local children's park, not a substitute for Coney Island.