Submerge! NYC Marine Science Festival

No one will actually dive at this event, but attendees will still be able to investigate the depths of the local estuary — where seawater meets fresh water — and the many creatures that live there. Presented by the Hudson River Park Trust and the New York Hall of Science, this salute to marine life will include catch-and-release fishing, kayaking, research stations, live music and science talks. The Hall of Science’s tent will let young festivalgoers test the ocean’s acidity and build a raft, and a River Ranger’s tent will offer water-theme crafts, touch tanks filled with creatures and a chance to observe plankton through a microscope.