It's tough to beat the playgrounds on Pier 6 in Brooklyn Bridge Park. There are massive slides, epic sandboxes, Swing Valley— and the Water Lab, the park's hot-weather crown jewel and arguably the best water playground in the city. The Water Lab encourages creative play, with water screws to turn and sprays to operate. There's a canal your little ones can fill with flowing water, or damn up—you can watch the children negotiate who does what. All that splashy fun will build appetites—good thing a wood-fired pizza enjoyed on the roof deck of Fornino is just steps away.