BOWIE AUTHOR APPEARANCE, Walter Mosley reads from his novel "Little Scarlet: An Easy Rawlins Mystery," about life in Los Angeles after the 1965 Watts riots. 6:30 p.m., Karibu Bookstore, Bowie Town Center Mall, 15624 Emerald Way, Bowie. Free. 301-352-4110.
COLLEGE PARK NEEDLE ARTS, an informal weekly gathering to work on quilting, knitting, embroidery and counted cross-stitch, sponsored by the College Park Needle Arts Society. 9:30-11:30 a.m., Old Parish House, 4711 Knox Rd., College Park. Free. 301-277-9630.
FORT WASHINGTON CARNIVAL, includes a moon bounce, pony rides, a dunk tank and a clown; refreshments will be sold. 5:30-8:30 p.m., Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Admission, free; rides, 25 cents each; free parking and shuttle bus service from Food Lion supermarket, 10715 Indian Head Hwy., Fort Washington. 301-203-6040.
HYATTSVILLE BOOK TALK, Ambrose Lane Sr. discusses his book "For Whites Only? How and Why America Became A Racist Nation." 7 p.m., Karibu Books, 3500 East West Hwy., Hyattsville. Free. 301-559-1140.
COLLEGE PARK YARD SALE, to benefit Lakeland Civic Association Scholarship fund; refreshments will be sold. 8 a.m.-2 p.m., College Park Community Center, 5051 Pierce Ave., College Park. Admission, free; vendors, $15, $20. 301-432-7777 or 301-345-3518.
FORT WASHINGTON FLEA MARKET, 9 a.m.-3 p.m., Tucker Road Community Center, 1771 Tucker Rd., Fort Washington. Free admission; vendors , $15. 301-248-4404.
PREPARING FOR COLLEGE, for prospective college students and their parents, representatives from the University of Maryland discuss admissions, financial aid and scholarships. 10 a.m.-noon, Potomac Landing Community Center, 12500 Fort Washington Rd., Fort Washington. Free. 301-292-9191.
MODEL AIRPLANE WORKSHOP, for ages 6 and older, representatives of the International Plastic Modelers Society help participants paint and assemble World War II aircraft models. Noon-4 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. $3 per model with regular museum admission of $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029.
UPPER MARLBORO BOAT TOUR, an educational river-ecology tour on board the Otter. 2-3 p.m. Saturday and Sunday, Patuxent River Park 16000 Croom Airport Rd., Upper Marlboro. Free; registration required. 301-627-6074.
BOWIE BOOK TALK, Tonya Lewis Lee and Crystal McCrary Anthony discuss their social satire "Gotham Diaries," a novel about Manhattan's black upper crust. 6:30 p.m., Karibu Bookstore, Bowie Town Center Mall, 15624 Emerald Way, Bowie. Free. 301-352-4110.
FORT WASHINGTON SCRABBLE GROUP, for players of all experience levels to improve their strategies. 6:45 p.m., Sipp'ss Cafe, 10707 Indian Head Hwy., Fort Washington. Free. 301-868-6360.
AVIATION CRAFT WORKSHOP, noon-4 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Free with regular museum admission: $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029.
SONGS OF AFRICA, soprano Devonna Rowe performs. 2 p.m., Upper Marlboro Library, 14730 Main St., Upper Marlboro. Free. 301-627-9330.
HYATTSVILLE MOVIE AND BOOK TALK, "The Princess Diaries" (2001), starring Julie Andrews and Anne Hathaway, about a clumsy teenager who learns she is a princess in a small European country, followed by a discussion of the Meg Cabot novel. 7 p.m., Hyattsville Library, 6532 Adelphi Rd., Hyattsville. Free. 301-985-4690.
TAKOMA PARK KNITTING GROUP, crocheting and knitting for ages 10 and older, all experience levels. 7 p.m. the fourth Tuesday of each month, Savory Cafe, 7071 Carroll Ave., Takoma Park. Free. 301-587-7174.
MYSTERY FILM AND BOOK DISCUSSION, "Holes" (2003), starring Sigourney Weaver, about a boy punished for a crime he did not commit who lands in a juvenile correctional facility headed by a malicious female warden, followed by a discussion of the Louis Sachar novel. 7 p.m., Hillcrest Heights Library, 2398 Iverson St., Temple Hills. Free. 301-630-4900.
GREENBELT MIDDLE RIVER HISTORY TALK, Loyola College history professor John Breihan discusses the Hale Walker-designed Maryland suburb of Middle River and its role in the making of World War II bombers. 7:30 p.m., Greenbelt Community Center, 15 Crescent Rd., Greenbelt. Free.301-507-6582.
MOVIE AND BOOK DISCUSSION, "Seabiscuit" (2003), starring Tobey Maguire, based on the real-life story of a jockey and race horse who triumphed against adversity in the 1930s, followed by a discussion of the Laura Hillenbrand novel "Seabiscuit: A American Legend." 6:30 p.m., Bowie Library, 15210 Annapolis Rd., Bowie. Free. 301-262-7000.
ADVENTURE FILM AND BOOK DISCUSSION, "Whale Rider" (2003), about a young girl who challenges her tribal group for a leadership position, followed by a discussion of the Witi Ihimaera novel "The Whale Rider." 7 p.m., New Carrollton Library, 7414 Riverdale Rd., New Carrollton. Free. 301-459-6900.
ADOPTION INFORMATION, representatives from Adoptions Together discuss the process for adopting an older black child and the support services that are available. Adoptive parents must be residents of Maryland, Virginia or the District. 7-8:30 p.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-439-2900.
CLINTON PUPPET SHOW, for ages 2-5, an educational, nature-oriented show. 10 a.m., Clearwater Nature Center, 11000 Thrift Rd., Clinton. $2; nonresidents of Prince George's and Montgomery counties, $1; reservations required. 301-297-4575.
HYATTSVILLE DISC JOCKEY LECTURE, Neci, an overnight disc jockey at WHFS-FM, discusses music production, promotion and the business end of the music industry. 7 p.m., Hyattsville Library, 6530 Adelphi Rd., Hyattsville. Free. 301-985-4690.
-- Compiled by GERRI MARMER
and LISA MARTIN
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