The Alexandria Volunteer Bureau is looking for volunteers to spend a few hours helping provide a Thanksgiving dinner for the needy during the weekends of Nov. 14 and 15, and 21 and 22. Operation Food needs people to collect food outside nine grocery stores, volunteers to pick up and deliver collected food, and others to sort and bag food at Red Cross. During Thanksgiving week, volunteers are needed to deliver baskets of Thanksgiving food to needy families. More volunteers are needed to help Hopkins House prepare its annual Thanksgiving dinner on Wednesday, and on Thursday, to set up and serve dinner to about 350 people. Volunteer work will be divided into shifts of two to three hours. Operation Food is a cooperative effort by several Alexandria human service agencies to provide emergency food for needy Alexandria families during holidays and throughout the year. For information, call 836-2176.

Parents of preschoolers are invited to attend a seminar on holiday home projects for kids at 9:30 a.m. on Tuesday at Spring-Mar Cooperative Preschool in Springfield. The instructor will demonstrate the fine points of making play dough, finger painting, making paste, party games and creating holiday arts and crafts. Baby-sitting is available upon request. To reserve a spot, call 569-6864. Spring-Mar Preschool is at 8336 Carrleigh Pkwy.

Sign up through Nov. 12 to run in the 11th Annual 10K Turkey Trot, scheduled to start at 9 a.m. Nov. 14 at Wakefield Recreation Center, 8100 Braddock Rd., Annandale. New this year, children ages 5 to 8 can sign up for a one-quarter mile Jr. Tot Trot, and children ages 9 to 12 can join Sr. Tot Trot. Registration is $10 for the Turkey Trot and $2 for the Jr. and Sr. Tot Trots and may be mailed to the Wakefield Center. For more information, call 321-7082.

The new Fairfax Art League invites prospective members to attend its next meeting at 1 p.m. Saturday. After a brief discussion of business matters, members will be given a watercolor demonstration and the opportunity to sketch a clothed model or landscape. The Fairfax Art League promotes the visual arts in Fairfax by offering regular exhibits, classes, demonstrations and workshops. The league's member show is on display on the first and second floors of Fairfax City Hall through Nov. 30. For more information, call 591-6494.

Sign up now to learn how to make dim sum, popular Chinese appetizers, at a Chinese cooking workshop on Nov. 10 and Dec. 1. The instructor, Lois Wong Tuey, is an award-winning cook. The seminar will run from 7 to 10 p.m. both days at the Vienna Community Center, 120 Cherry St.. The fee is $8 for Vienna residents and $10 for out-of-towners, plus $4 for the food. For information, call 255-6360.

The 18th Annual Falls Church Antiques Show and Sale, drawing registered dealers from the Washington area, will display and offer furniture and wares tomorrow through Sunday at the Falls Church Community Center. Proceeds from the event will benefit youth sports activities in Falls Church. Hours for the sale will be from 11 a.m. to 9 p.m. tomorrow, 11 a.m. to 7 p.m. Saturday, and noon to 5 p.m. Sunday. The center is at 223 Little Falls St. For more details, call 241-5077.