COLUMBIA BOOK DISCUSSION, "A Judgement in Stone," by Ruth Rendell. Sonsored by the Noontime Book Club; noon, Howard County Central Library, 10375 Little Patuxent Pkwy. Free; registration required. 410-313-7860.
LIBRARY CHESS CLUBS, for players ages 9-17 of all skill levels with a basic understanding of the game. 3-5 p.m. today, East Columbia Branch Library, 6600 Cradlerock Way, Columbia, 410-313-7700. Free.
COLUMBIA SPRINGTIME PARTY, for teenagers and their younger siblings. Includes a disc jockey, door prizes, arts and crafts, and pizza. Sponsored by the Columbia Association Teen Center; 4-6 p.m., the Barn, Oakland Mills Village Center, 5851 Robert Oliver Pl. Free. 410-992-3726.
UNDERSTANDING GRIEF SUPPORT GROUP, sponsored by Hospice of Howard County; 5:30-6:30 p.m., 5537 Twin Knolls Rd., Suite 433, Columbia. Free; registration required. 410-730-5072.
ELKRIDGE BOOK DISCUSSION, for children ages 7-9 accompanied by an adult. "Trading Places With Tank Talbott," by Dori Hillestad Butler. Sponsored by the Elks Jr. Book Club; 7-8 p.m., Elkridge Branch Library, 6540 Washington Blvd. Free; registration required. 410-313-5085.
COOKSVILLE WRITING WORKSHOP, for aspiring authors. Bring original works to share with others and get feedback. Sponsored by the library's Writers' Circle; 7-8:30 p.m., Glenwood Branch Library, 2350 Route 97 (Roxbury Mills Road). Free; registration required. 410-313-5577.
ELLICOTT CITY SIGN LANGUAGE CLASS, for adults and teenagers. Learn about the culture of the hearing impaired and how to use American Sign Language. 7:30-8:30 p.m. Thursdays, Miller Branch Library, 9421 Frederick Rd. Free; registration required. 410-313-1950.
COLUMBIA SLEEP DISORDER LECTURE, "Sleep Apnea and Your Child: Symptoms and Treatment." Laura Sterni, a medical director of Howard County General Hospital's Pediatric Sleep Laboratory, and members of Sleep Services of America discuss diagnosis and treatment of childhood obstructive sleep apnea syndrome. Sponsored by Howard County General Hospital; 7:30-9:30 p.m., Faulkner Ridge Center, 10910 Route 108. Free; registration required. 410-313-7161.
COOKSVILLE LIBRARY SCIENCE PROGRAM, for children ages 3-6 accompanied by an adult. Learn about simple science concepts and perform experiments inspired by children's literature. 11 a.m. Fridays, through May 6, Glenwood Branch Library, 2350 Route 97 (Roxbury Mills Road). Free; registration required. 410-313-5579.
SENIORS LAUGHTER THERAPY PROGRAM, for ages 55 and older. "Laughter -- The Best Medicine," a therapy exercise program that tries to strengthen the immune system, lower blood pressure and promote emotional healing. Sponsored by the Howard County Department of Recreation and Parks; 11 a.m.-noon Friday, Colonial Landing Apartments, 6391 Rowanberry Dr., Elkridge; 11:15 a.m.-12:15 p.m. June 10, Kiwanis-Wallas Recreation Center, 10481 Frederick Rd., Ellicott City. $5; registration required. 410-313-7279.
WOODSTOCK BIRD WALK, for beginners. On an easy walk through fields of Mount Pleasant Farm, search for non-meadow species, try to see flying birds, and learn how to use binoculars and field guides. Sponsored by the Howard County Bird Club; 8 a.m., meet at shed, Howard County Conservancy, 10520 Old Frederick Rd., Woodstock. Free. 410-461-3361 or www.howardbirds.org.
ELLICOTT CITY GARDENING TALK, a master gardener discusses gardening concerns and problems. 10 a.m.-noon Saturdays; 7-8:30 p.m. Mondays, through Sept. 26, Miller Branch Library, 9421 Frederick Rd. Free. 410-313-1950.
ELLICOTT CITY WALKING TOUR, for ages 18 and older. Local author Joetta Cramm shares stories and facts about the history of Ellicott City on a walk through the historic area of the town. Sponsored by the Howard County Department of Recreation and Parks; 10 a.m., meet at parking lot A, Oella Ave., Oella. $12; registration required. 410-313-7275.
SHAKESPEARE BIRTHDAY CELEBRATION, for ages 7 and older. Anticipate the birthday of William Shakespeare, believed to have been born on April 23, 1564, with theatrical stories and other activities. 11:30 a.m. Saturday, Miller Branch Library, 9421 Frederick Rd., Ellicott City. Free; registration required. 410-313-1955.