September 6

Castle Medical Center, four Sundays starting Sept. 6, 2-4 p.m., $45/person, $80/couple. Designed and taught by experienced labor and delivery nurses, this class is specifically geared for couples giving birth at Castle Medical Center. You will learn different aspects of the birth experience, from preparing for the hospital to caring for you and your baby. Pre-registration required. (263-5400, castlemed.org)

Happiness U, 560 N Nimitz Hwy. Ste. 117A, 3-4 p.m., free. Hear from founder Alice Inoue about how it is possible to change your life by changing your focus, and experience firsthand what Happiness U has to offer. Pre-registration required. (yourhappinessu.com)

Art Explorium, 1142 Koko Head Ave., 2:30-4 p.m., $15. A medley of a workshop, students will have opportunities to explore performance techniques, as well as design some unique art props. Breath control, vocal warm-ups, dance and acting games will guide us as artists and performers. Pre-registration required. (artexplorium.org)

Hanauma Bay Nature Preserve, Education Alcove Classroom, 3-4 p.m., free. Presentation of “Giants in the Dark: the Japanese Sentoku and Other Deepwater Discoveries off Oahu’s South Shore” by Hans Van Tilburg, NOAA. (397-5840)

The ARTS at Marks Garage, 1159 Nuuanu Ave., 7 and 9 p.m., $10. The Female Comics of Hawaii present 12 local female comics and two mainland headliners, Robin Tran and Cate Gary for the first all-female comedy festival in Hawaii. (eswartzkopf@gmail.com)

Ben Franklin parking lot, 2810 Paa St., 9 a.m.-2 p.m., free. More than 35 vendors, crafters, make-and-takes and closeouts. (479-5525, hawaiiantreasures4u@hawaii.rr.com)

Pearlridge Center Downtown, 1-4 p.m., free. A dozen artists gather to create cooperative art, and keiki and families are invited to watch or participate! (203-2366)

Honolulu Polo Club in Waimanalo, Sundays through Oct. 25, 3 p.m., $5. Enjoy the 29th season of polo with Honolulu Polo Club. (honolulupolo.com, 521-6927)

Turtle Bay Resort, 8:30 a.m. registration, 10 a.m. start, $90. Participate in a 1.0-1.8K ocean swim and a 5K run. Afterwards, enjoy the Kona Brewing Co. beer garden. (turtlebaybiathlon.com)

Hawaii Convention Center, 5-9 p.m., free. Enjoy food, crafts, entertainment from Kuikahi and John Feary, and a screening of “The Lego Movie.” (943-3025, faceook.com/hawaiiconventioncenter)

Iolani Palace, 10 a.m., free. Royal Hawaiian Band performs at Onipa‘a, a day celebrating Queen Lili‘uokalani. (922-5331)