Music Break: Puuhonua Trio performs Hawaiian music and hula, noon, Tamarind Park.
Sea Grant seminar: Mark Merrifield of the Department of Ocean Engineering discusses patterns, testing and applications for "A Wave Model for Island Regions," 3 p.m., UH-Manoa's Marine Science Building, Room 100. Call 956-7410.
Pearlridge Center: Jennifer Barber sings at 6 p.m., then Vizion performs 7 p.m., Downtown.
Barnes & Noble: Lee Eisenstein performs, 8:30 p.m., Kahala Mall.
Lanai (garage) sale: Items from the Waikiki Residents Association, 8 a.m. to 2 p.m., fenced parking lot across the street from the Outrigger Hobron Hotel. Call 923-7965.
"Every Child Can Succeed": Conference focuses on successful schools in low-income communities, 8:30 a.m. to 3:30 p.m., Moanalua High School cafeteria. With Asa G. Hilliard III speaking on "Power Teachers in Power Schools," and Los Angeles principals Esther Castruita, Anyim Palmer and Nancy Ichinaga. Costs $35. Call 239-8112.
Children's fair: Activities, games and entertainment for the family, 9 a.m. to 3 p.m., Kapiolani Park Bandstand. Honolulu Police Department offers a Toy Weapon Exchange, offering educational gifts to children who turn in toy weapons. Call 587-5266.
Home improvement and garden fair: Free samples, plants for sale and experts at hand to answer general questions on home supplies, 10 a.m. to 2 p.m., Town Center of Mililani. Free. Participating businesses include City Mill, American Cabinetry, the Closet Space, and the Mililani Bonsai Club.
Fashion show and luncheon: "We Present," fashions by six UH-Manoa designers, 11:30 a.m., Hale Koa Hotel. Tickets $25. Call 955-7235 or 956-2243.
Lyon Arboretum: Microbiologist Janice Ito discusses composting, 12:30 to 2:30 p.m. Costs $15.50 per class, plus $2 supply fee. Call 988-7378.
Billiard exhibition: Featuring Rodney Morris, 1 p.m., Windward Mall.
Borders: Jennifer Barber sings songs from her latest release, 2 p.m., Ward Centre.
Citizen Action Project party: Nonprofit group celebrates Earth Day with games and live music by Sidetracked and Mojo Hand, 4 p.m. to 1 a.m., Gordon Biersch restaurant. The group's programs include Trees for Life (delivering extra fruit to homeless shelters), Clean Reef Campaign (underwater clean-ups) and Stop the Dumping Campaign (investigating illegal dumping). Donation $5. Call 941-4854.
"How to Obtain Happiness": Seminar with Kazuhiro Takegawa from Kofuku No Kagaku, 6:30 p.m., Pikake Room, Royal Garden at Waikiki. Admission $5. Call 955-5777.
Parents Without Partners: April Showers Open Dance has line dancing, waltz lesson, games and more, 8 p.m. to midnight, Tripler Officers Club. Costs $10 general. Call 262-6442.
Humanists Hawaii: Religion professor S. Cromwell Crawford discusses suffering from a human perspective, 9:30 a.m., UH-Manoa's Watanabe Hall, Room 112. Call 247-6226.
Olaloa Community craft fair and farmer's market: 10 a.m. to 2 p.m., 95-1050 Makaikai St., Mililani-Mauka. Call 626-8446.
Sunday Snoop: Explore five homes and a private club in Hawaii Loa and Niu Valley. Shuttle buses will depart from Kalani High School every 15 minutes between 10 a.m. and 4 p.m. Tickets $20 in advance, $25 that day. Call 261-5681. Tickets available from ASID members, Gentry Pacific Design Center stores, Homeworld Stores, Martin and MacArthur at Aloha Tower Marketplace, Wayne Parker Partners in Design Inc. and Wade Ltd. Realtors in Kailua, Fiddler's at Ward Industrial Center, Remodeling Specialists and Mark Masuoka Designs on Waialae Avenue, Paradizzio at Kahala Mall, and Timothy's Garden at Hawaii Kai Shopping Center.
Earth Fest '96: Kids' scavenger hunt, games and more, 10:30 a.m. to 6 p.m., Kapiolani Park. Entertainers include the Royal Hawaiian Band, Olomana and Martin Pahinui. Exhibits focus on alternative vehicles and other subjects. Free admission. Call 595-0057. For booth rental, call 259-9081.
Pearlridge Center: Vizion performs at noon, then Jennifer Barber sings at 1 p.m., Uptown.
Kiwanis Club of Kihei/Wailea: "Swing in the Spring," dancing and silent auction, 5:30 to 9:30 p.m., Ukulele Grill. Admission $15. Call 874-9344.
Hale Koa Hotel concert: Air Force music combo Pacific Vision performs, 4 p.m.
Historic preservation lecture: Nellie Longsworth of Preservation Action, Washington, D.C., speaks on "Lobbying Congress in '96," noon, Iolani Barracks Visitor Center, palace grounds. Free. Call 956-9546.
Natural history lecture: Researcher Richard Grigg describes ancient reef builders and explains how reef development can reveal earth history and contribute to the formation of islands - ours in particular - 7:30 p.m., Waikiki Aquarium foyer. Doors open 7 p.m. Donation $4. Call 923-9741. Coral reef lecture series concludes May 15.
Hawaii Pacific University: Free financial aid seminar, 12:15 p.m. Call 544-0238.
"The Mummies of Xinjiang": Elizabeth Barber, professor of linguistics and archaeology at Occidental College, Los Angeles, discusses a recent find of mummified Caucasian bodies, 5 p.m., Academy Theater. The remains date back to the Bronze Age, nearly 2,000 years before the Silk Road was established. Free. Call 955-4416.
Space lecture: "Comets! What's All the Fuss," by astronomy professor Karen Meech, 7:30 p.m., NASA Planetary Data Center, UH-Manoa's Sinclair Library. Free. Call 956-3132.