Woodbridge resident Evelyn Coffenberry has been hired as an assistant to state Del. Jack Rollison (R-Woodbridge) for the General Assembly session that opens next week. Coffenberry will act as legislative liaison for Rollison's 52nd District constituents.

A longtime civic activist who serves on the Prince William Comprehensive Plan Committee, Coffenberry was chairman of the Woodbridge-Dumfries Comprehensive Plan Committee and the Prince William Taxi Club Review Board. For the past four years she has been an aide to Woodbridge Supervisor Donald E. Kidwell, who did not seek reelection in November.

Children's Theatre Series The Magic Window Children's Theatre will kick off its 1988 theater series Saturday with the heroic adventures of "Sir Slob and the Princess." Two performances will be held: at 10 a.m. at Woodbridge Middle School, 2201 York Dr., and at 2 p.m. at Osbourn Park High School, 8909 Euclid Ave.

The play, which will be performed by the nonprofit Prince William Little Theatre, focuses on a knight, Sir Slob, who must defeat a lion, a wicked witch and a giant to win the hand of a princess.

The play is sponsored by the Prince William Park Authority and the Cultural Arts Federation. Admission is $3 at the door; tickets for groups of 12 or more may be purchased for $2 per person. For more information, call 361-7126.

Marine Honorees Two Quantico Marines spent the holidays with their families in Washington after being selected by the corps as officer and Marine of the year at Quantico.

Sgt. Wesley Feight and Cpl. William Haase Jr. stayed with their parents for one week at a downtown hotel as part of a program developed and sponsored by the USO.

Course in Discipline A six-lesson home study course titled "Discipline for Young Children" is being offered by the Prince William Extension Service to the first 100 parents who sign up.

The lessons, which are mailed to participating parents every week, focus on coping and adjusting to children's behavior and misbehavior. Parents proceed at their own pace through the lessons, which are offered free.

The program, which is targeted for children ages 6 to 12, was written by child development specialists at Virginia Tech to help children learn self-control, responsibility and how to get along with family and friends.

To get on the mailing list, call the extension office at 335-6285.

Art Contest Planned An art contest for county students in grades 4 through 12 will be held Jan. 23 at Charlie Brown's restaurant in Lake Ridge.

The contest, sponsored by the Bel Air Woman's Club, includes paintings done in oil, watercolor, pastel, acrylic and charcoal; sculpture and black-and-white photography.

Now in its third year, the contest attracted more than 150 entries last year. Winners have gone on to compete in the club's state-level contest.

Registration will be held at 9 a.m., with judging beginning at 10. For more information, call 670-2664 or 330-0408.