Participate in the Mark Center Annual Harvest Flea Market Saturday by reserving a space for your goods before tomorrow. From 10 a.m. to 4 p.m. Saturday, vendors at more than 100 outdoor stands will sell handmade crafts, antiques, second-hand books, albums, furniture and many other items.

Sponsored by the Hamlet Community Club, the flea market will be held at Mark Center Office Park, 1500 N. Beauregard St., Alexandria, across the street from the Radisson Mark Plaza Hotel. Rain date is set for Sunday.

Registration for a table must be made in person at the club, 5708 Merton Ct., Alexandria. For information, call 578-7850.

Adults older than 55 years old are invited to take advantage of a series of free seminars at Northern Virginia Community College's Alexandria campus. The program starts Oct. 14 with "If You Can Write -- You Can Draw," an introductory seminar to drawing taught by an area artist.

The next seminar, on Oct. 20, is called "You're Looking Older?? Great!" and will examine some of the positive aspects of growing older. On Nov. 5, members of the Washington Old Time Radio Club will take a nostalgic look at the golden age of radio in "Don't Touch That Dial." Finally, on Nov. 19, the architecture and culture of Morocco will be the focus of a travelogue, "The Road Through Morocco."

For further information on the free workshops, call 845-6301.

Blue is only one color the sky may boast this weekend at the American Kitefliers Association's 10th annual convention at the Loudoun campus of Northern Virginia Community College. Weather permitting, serious kite fliers will demonstrate their skills in a series of comprehensive competitions, stunts and free flying events today through Sunday from 10 a.m. to 5 p.m.

Tonight, convention-goers will see a night kite fly on the picnic grounds of the Dulles Marriott Hotel near Dulles International Airport.

For competition information and times, please call the Office of Continuing Education at the Loudoun campus, 450-2551 or 450-2552.

If Italian is your style (or for that matter, Italian food), make a point to stroll by Market Square at 301 King St. in Old Town Alexandria for an Italian Festival on Saturday.

Sponsored by the George Washington Chapter of the Order of Sons of Italy in America and the Alexandria Department of Recreation, the Italian Festival will celebrate the culture and traditional foods of Italy.

From 11 a.m. to 5 p.m., participants may purchase Italian-style arts and crafts, enjoy free entertainment and choose from a variety of foods, including hot subs, pastries and Italian bread.

Rain date is Oct. 11.

For information, call the Department of Recreation at 838-4343.

The next Rabies Inoculation Clinic for dogs and cats in Arlington County will be held from 6:30 to 8:30 p.m. on Oct. 14 at the Animal Welfare League, 2650 Arlington Mill Dr., Arlington. Animals must be at least 3 months old, and pet owners are strongly urged to carry cats in secure carriers. Inoculation fees are $4 for dogs and $2 for cats. For more information, call the Arlington County Department of Human Services at 558-2661.

Registration to play Falls Church community basketball starts Oct. 12 and is open to adults as well as children. Volunteers are needed to coach games. Boys 7 to 18 years old are encouraged to register through Nov. 7. Girls in the same age group may register until Nov. 14. Men's and women's registration will be accepted until Nov. 14.

Registration is done on a team basis. Individuals seeking to join a team and teams may sign up for one by calling 241-5027.

Teams should sign up at the Falls Church Community Center at 223 Little Falls St.