Family Miami Underwater Festival: “Coasts, Reefs and Open Oceans” is the theme of the fourth-annual event. Learn about underwater film and photography, aquarium-building, sea creatures and water safety. 11 a.m., Frost Museum of Science, 3280 S. Miami Ave., Miami, $9.30-$14.95, 305-646-4200, miamisci.org.

Source: www.southflorida.com