Sunset Natural History Walk: Learn about waves, beaches and Waikiki, 6 to 7:30 p.m. Friday. Costs $6 adults, $5 children. Call the Waikiki Aquarium at 923-9741.
African dance and drum classes: With Ousmane Gallo Soumah, Friday through Sunday, UH-Manoa's Athletic Facility, Studio 3. Charge. Call 239-6058.
Sierra Club: Help build the Maunawili Falls access trail, Saturday and Sunday. Bring backpack, lunch, two liters of water, shoes and rain gear. Call 538-6616.
Kilauea Volcano Wilderness Runs: Saturday, Kilauea Military Camp. Call 982-7783, Big Island.
Taro Patch Party: Learn how taro is cultivated and its role in Hawaiian culture, 9:30 to 11:30 a.m. Saturday, Hawai'i Nature Center. Costs $5. Reserve at 955-0100.
Honolulu Zoo: Enter the nightlife of the zoo's
citizens, 7 to 9 p.m. daily, Saturday through Tuesday. Admission $7 adults, $5 children. Reserve at 971-7188.
Ka'au Crater hike: Steep valley-to-ridge hike with Ken Suzuki of the Hawaiian Trail and Mountain Club, 8 a.m. Sunday. Six miles. Costs $2. Call 845-4691.
Collage workshop: Gloria Foss and Susan Rogers-Aregger teach paper dyeing and collage, 9:30 a.m. to 2:30 p.m. Aug. 10, 17, 18, 24 and 25 at Ho'omaluhia Botanical Garden. Costs $70 for dyeing day and $105 for four-day workshop, or $30 per workshop, plus tax. Call 395-4702 or 839-1573. Payment due July 30.
Shishu embroidery: Classes in this traditional Japanese needlework will run 9 a.m. to 4:30 p.m. daily, Aug. 16 to 19, Kuakini Health System's Hale Pulama Mau auditorium. Costs $289, including tools, silk and gold fibers; part of the proceeds will go to Kuakini Foundation. Call Stephanie Nagata at 587-2767 days or 988-7538 evenings.
Sports Acrobatics Hawaii: Hawaii Highflyers Trampoline Club for adults and kids, 4 and 5 p.m. Mondays and Wednesdays, McCully Recreation Center. Call Karl Vorwerk at 949-3747.
Waikiki Acrobatic Troupe meets 4 p.m. Sundays at the beach across Kapiolani Park Bandstand; free workout at UH Studio Four 8 p.m. Wednesdays. Call Don Heafner at 536-7205.
Learn to swim: Children practice Saturday mornings at Ala Moana Beach; adults, Monday, Wednesday and Thursday evenings. Free. Call the American Red Cross, 734-2101 ext. 123 or 124.
Free hike to Diamond Head: Meet the Clean Air Team at the Honolulu Zoo entrance, 9 a.m. Saturdays. Three miles to the top. Call 948-3299.
Philippine folk dancing: 2:30 to 4:30 p.m. Saturdays, Lanakila Gym. Free. Call 455-9963.
Hash House Harriers: Social runs with Aloha group 3 p.m. Saturdays; call 948-AHHH (948-2444). Or Honolulu group 5:30 p.m. Tuesdays; call 948-HASH (948-4274).
Hawaii Israeli Recreational Dance: Noon to 3 p.m. Sundays, Ala Wai Ballroom. Costs $3.50. Call 623-3603.
Honolulu Marathon Clinic: Free training runs with Jack Scaff and staff, 7:30 a.m. Sundays, Kapiolani Park Bandstand. Call Norm at 247-4957. No meetings on three-day weekends.
Ikebana classes Lillian Koide teaches flower arrangement 9 a.m. to noon Wednesdays at the Japanese Cultural Center. Tuition $30 per month plus supplies. Call 537-5765 evenings.
International folk dancing: Includes Bulgarian, Greek, Rumanian and Israeli dances, 7 to 9:15 p.m. Sundays, Makiki District Park. Donation. Call 923-0362.
Line dancing: 9:30 to 11 a.m. Tuesdays, Waikiki Community Center. Costs $3. Call 923-1802.
Scandinavian dancing: 7 to 9 p.m. Wednesdays, Ala Wai Golf Course Clubhouse. Free. Call 922-0793 or 955-2577.
Pali Twirlers square dance: 7:30 to 9:30 p.m. Thursdays, Yacht Club Terrace. Call 254-2333.
Honolulu Zoo: The zoo opens at 8 a.m. on the first and third Wednesdays of the month. General admission $6; $2 with Yum Yum Tree senior card. First Wednesdays feature a botanical tour at 8:45 a.m. for $2 more. Third Wednesdays, tai chi practice begins 8 a.m. Call 971-7174.
Nature Conservancy hikes: Two guided hikes a month to Honouliuli Preserve, home to more than 45 rare native plants and animals. Donation. Call 537-4508.