April 18

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 8:30 a.m.-4:30 p.m., $129. Learn to provide the best care to infants and children age 10 and younger. (1-800-733-2767, redcross.org/take-a-class)

Honolulu Museum of Art School, 1111 Victoria St., Saturdays from April 11-May 9, 11:30 a.m.-12:30 p.m., check website for cost. Local ikebana masters share their expertise and joy of flower arranging with youth grades 2-12. (532-8741, honolulumuseum.org/learn/classes)

UH-Manoa, 9 a.m.-3:30 p.m., free. Girls in grades 6-8 are invited to try three hands-on workshops in topics ranging from botany, meteorology, ocean science, marine biology, astronomy and more. Pre-registration required. (eyhhawaii.org, 956-3636)

Lotus Honolulu, 2885 Kalakaua Ave., April 18-19, 10 a.m.-4 p.m., $195. Learn a no-worries method of painting with watercolors. Pre-registration required. (patrice@artofaloha.com)

Geobunga Windward, 41-732 Kakaina St., 9-10 a.m., free. Learn how to compost using free, readily available food waste and other organic material from yards. Pre-registration required. (geobunga.com/workshops)

RevoluSun, 210 Ward Ave., 9-10:30 p.m., free. Visit a gathering place for eco-conscious homeowners, architects and residential developers to meet and collaborate, while those interested in solar can also learn more about the latest in photovoltaic solar options and financing. Pre-registration required. (748-8888, revolusun.com)

Waialua Community Association, 6-8:30 p.m., free. Learn about health consequences of exposure to pesticide “drift” on our children, how to protect your family and safer farming options. Expect door prizes, music, refreshments and guest speakers. (393-7122)

Ewa Beach Elementary School, 9 a.m.-noon, free. Check website for acceptable and unacceptable materials. (kokuahawaiifoundation.org, 3rs@kokuahawaiifoundation.org)

Kapolei Shopping Center, 590 Farrington Hwy., 7:30 a.m.-noon, free. Donate blood to save lives. Appointment recommended. (848-4770, bbh.org)

Mililani Market Place, 94-780 Meheula Pkwy., 7 a.m.-1:15 p.m., free. Donate blood to save lives. Appointment recommended. (848-4770, bbh.org)

Kaimuki High School, 2705 Kaimuki Ave., 8 a.m.-3 p.m., free. Materials accepted include computers, monitors, laptops, printers, fax machines, servers and more. No quantity limits. Check website for list of acceptable and unacceptable items. (ewastehawaii.com, 488-8870)

Kapolei Shopping Center, 590 Farrington Hwy., 8 a.m.-3 p.m., free. Materials accepted include computers, monitors, laptops, printers, fax machines, servers and more. No quantity limits. Check website for list of acceptable and unacceptable items. (ewastehawaii.com, 488-8870)

Eden in Love at Ward Warehouse, 10 a.m.-9 p.m., free. #GOCRAYFORADAY with a possible 40 percent discount at Eden in Love, with games, giveaways and drinks. (591-1005, edeninlove.com)

Windward Mall, noon-5 p.m., free. Learn what esports are, and what they have to offer, with the Hawaii gaming community, including tournaments, guest speakers, awareness panels and more. (asao@esportshi.com)

Queen Kapiolani Hotel, Queen’s Room, 9 a.m.-4 p.m., free. Hawaii Stamp and Coin Dealers Association holds a coin show with local dealers available to buy, sell or trade. A limited supply of numismatic newspapers and magazines available, with door prizes awarded throughout the day. (531-6252)

Ala Wai Boat Harbor, 9 a.m.-1 p.m., free. Save your recyclable waste and help turn trash into cash for community programs. Acceptable items include scrap metal, cell phones, batteries, computers, HI-5 beverage containers and more. (291-6151, renemansho@hawaii.rr.com)

Nuuanu Congregational Church, 9 a.m.-2 p.m., free. The Free Cycling section will have gently used clothing, linens, towels, bags, shoes and more, plus free shredding and e-waste pickup, vermicomposting items and more. (595-3935)

Ka‘elepulu Elementary School, 530 Keolu Drive, 9 a.m.-3 p.m., free. Shopping, food and fun for the entire family. (372-6752)

UH-Manoa’s Lyon Arboretum, 3860 Manoa Road, 9 a.m.-2 p.m., free. Browse ti varieties, Hawaiian plants, vegetable plants and many more for homes and gardens. Volunteers will also sell jams and jellies, oshibana, wreaths, pots and more, plus expect keiki activities and Tahitian dancing. (988-0456)

Manana Elementary School, 9 a.m.-2 p.m., free. Enjoy a craft fair, with vendors including Island Papercrafter, Beads and Things by Kori, Thirty One and more. (454-5305, manana.k12.hi.us)

Waikiki Aquarium, 9 a.m.-2 p.m., free. Learn more about how to preserve and protect Hawaii’s environment, with a puppet show, performances, mural and more. (768-3248, cleanwaterhonolulu.com)

Hungry Ear Records, 2615 S. King St., 8 a.m., free. Celebrate Record Store Day and visit a brick-and-mortar music store with exclusive releases on vinyl and CD. (hungryear.com)

Harris United Methodist Church, 20 S. Vineyard Blvd., 8:30 a.m.-12:30 p.m., free. Browse gently used clothing, kitchenware, toys, books, white elephant, linen, handbags and some new items at bargain prices. Proceeds benefit Harris UMC ministries. (536-9602)

Hawaii State Library, 11:30 a.m., free. In celebration of Money Smart Week @ Your Library, three young men — Grant Takara, Eric Teshima and Carson Wong — return to share information about their original business, growth, future plans and more. (586-3490)

Waialua Public Library, 9 a.m.-2 p.m., free. Great finds at great prices. (637-8286)

Windward Mall, center court, noon-5 p.m., free. Digital dunking and technical fouls are in play on E-Sports Awareness Day, an afternoon of physical activities sponsored by E-Sports. (235-1143)

Pearl Harbor Visitor Center, 11 a.m. and 3 p.m., free. Join the NPS ParkEd Team at the Pearl Harbor Visitor Center for scavenger hunts, a USS Arizona documentary, a boat ride to the memorial and a junior ranger pinning ceremony. Later, watch a screening of “Planes: Fire & Rescue.” (emily_pruett@partner.nps.gov)

Hawaii State Library, 10:30 a.m., free. In celebration of Money Smart Week @ Your Library, keiki are invited to learn about money as well as saving money through stories and crafts. (586-3510)

Meet at Bellows Air Force Station Beach Park, 9:30 a.m., free. Drive through Waimanalo to Koko Marina in Hawaii Kai, picking up donations for Hawaii Foodbank. (395-8640, sonoue@hawaii.rr.com)

Meet at Heeia-kea Small Boat Harbor, 10 a.m. or 1 p.m., $10-$20. Take a ride on Coral Queen glass-bottom boat, share mo‘olelo and talk about marine researches. Pre-registration required. (235-8111, legendsofkoolau@aol.com)

Meet at Pu‘u O Mahuka Heiau, 10 a.m.-1 p.m., free. Bill Hawes teaches organic permaculture farming techniques and leads a tour of the facility. (498-8385, christina@hilt.org)

Chez Sports Bar & Grill, 98-150 Kaonohi St. C226, 9:30 p.m.-12:30 a.m., free, age 21 and up. (347-1323)

The Republik, 1349 Kapiolani Blvd., 10 p.m., $25/advance, age 21 and up. Common King celebrates the upcoming release of its first album this fall. (jointherepublik.com)

Salt-Lake Moanalua Public Library, 1 p.m., free. Four-time Grammy Award winner Bobby Ingano, best known for his blues guitar and Hawaiian steel guitar music since 1980, will perform and share his perspective on the music of Hawaii. (831-6831)

The Saloon at Kalaheo Steak and Ribs, 4444 Papalina Road, 7-10 p.m., free. (332-4444)

Ground floor of parking garage near Kailua Longs/CVS, 4-5:30 p.m., free. Featuring storyteller and musician Keikilani Lindsey. (castlefoundation.org/kanikapila-in-kailua/)

Kroc Center’s Performing Arts Theatre, 6:45 p.m., call for cost. The fifth annual festival showcases an exciting variety of talents, individuals and groups, including the Navy Pacific Fleet Band, FilCom Banda Kawayan Hawaii, Hypersquad for Life and more. (623-4045)

UH-Manoa’s East-West Center’s Imin Center, 1601 East-West Road, April 18 at 8 p.m. and April 19 at 4 p.m., check website for cost. Parashuram Bhandari performs on the sarangi. (arts.eastwestcenter.org, 944-7177)

Bishop Museum’s J. Watumull Planetarium, 1525 Bernice St., April 18, May 2 and 16, and June 6 and 20, 8-9 p.m., $6-$8. Mike Shanahan presents live classical guitar alongside a tour of the evening sky. Reservations required. (bishopmuseum.org/planetarium/skytonight.html)

Jazz Minds Art and Cafe, 1661 Kapiolani Blvd., 9 p.m., $7. (945-0800)

Next Door, 43 N. Hotel St., 8 p.m., $15/presale, $20/at the door. Pretty Peacock Productions present BurlyQ Bingo, featuring live performances from Miss Catwings, Lola Love, Dr. Ginger Snapz, Bettie Bourbon and more. (prettypeacockproductions.com/upcoming-events)

Kapolei High School Plaza, 5:30-8:30 p.m., $25-$75. Malama Learning Center presents its annual fundraiser featuring live entertainment, cultural activities, a country store, silent auction and, of course, lots of food. (351-9465, malamalearningcenter.org)

Queen Emma Summer Palace, 5-9 p.m., $25-$30. Friends of the Royal Hawaiian Band unveils a newly commissioned piece in honor of Ed Michelin, plus a concert from the band, entertainment and food. Pre-registration required. (222-7853, parade.lady001@gmail.com)

The Pacific Club, 1451 Queen Emma St., 6-10 p.m., $200. Eat local, organic, sustainable food and dance under the stars with DJ Keith Kandell in support of Hawaii Autism Foundation. (hawaiiautismfoundation.org, newwave2015.brownpapertickets.com)

Manoa Valley Church, 2728 Huapala St., 5-8 p.m., $15. Relive or redo your prom night with dinner, dancing, a silent auction and photo booth, in support of Manoa Valley Church Preschool and After School Care programs. (manoavalleychurch.org, 988-3271)

Kuhio Beach Hula mound near Duke Kahanamoku statue, 6:30-7:30 p.m., free. Lilinoe Lindsey and Ka Pa Nani O Lilinoe perform. (843-8002)

CUPOLA Theater at Honolulu Design Center, 7:30 p.m., $30. A concert featuring unique collaborations of music, dance, poetry, art and calligraphy with world-class artists. (willowchang@hotmail.com)

Tenney Theatre at St. Andrew’s Cathedral, April 18, 25 and May 9 at 4:30 p.m., April 25 at 1:30 p.m., $10-$20. Honolulu Theatre for Youth presents “Where the Mountain Meets the Moon.” (htyweb.org, 839-9885)

Waimea Valley, 9 a.m.-3 p.m., free. Head up to Kalahe‘e Ridge with the conservation crew and plant native trees as part of an ongoing forest restoration project. Those who cannot commit to a full day can still help clean and weed the Kauhale area. (638-5877)

Visit website for map to location, 8 a.m.-noon, free. Participate in a work day at Waikalua Loko Fishpond in Kaneohe. Bring old clothes and shoes, gloves, sunscreen and a water bottle. Pre-registration required (263-8202, waikalualokofishpond.org)

Windward Community College, Hale Imiloa, 45-720 Keaahala Road, 9 a.m.-noon, free. Help Hui o Kooloupoko maintain the rain gardens at Windward Community College. Pre-registration required. (huihawaii.org)