Kayak ‘round Hudson River Pier 96, Pier 40, 72nd Street, Governors Island. The Downtown Boathouse super loves the Hudson. So hard they strive to provide free kayak rentals for floating upon it. Only the Pier 96 and Pier 40 locations are open during the week, though (5 pm to 7 pm Monday through Friday, 5 pm to 7 pm Thursday, respectively). For the skiddish parents (or their adult children [you]), they also offer free lessons. Price - free.