Register your child today or tomorrow to have breakfast with Santa from 8:30 to 10 a.m. Saturday at the Providence Recreation Center, 7525 Marc Dr., Falls Church. The cost is $4 and includes caroling, pancake breakfast and a photograph taken with Santa. Call 698-1351.

Encourage your child to make crafts for holiday decoration or gift-giving by reserving a spot in one of two natural holiday craft-making workshops at Riverbend Nature Center, 8814 Jeffery Rd., Great Falls. Registration is due today and tomorrow for the first workshop, intended for children ages 6 to 8, to be held from 2:30 to 3:30 p.m. Monday. Children ages 9 to 12 must be registered by Sunday for a workshop scheduled for 10 to 11:30 a.m. Dec. 12. Call 759-3211.

Children may make holiday gifts from natural and recycled materials at one of two craft workshops scheduled on Dec. 12 at Hidden Oaks Nature Center, 4030 Hummer Rd., Annandale. The first, a workshop for children ages 6 to 9, will take place from 9:30 to 10:30 a.m. Children ages 3 to 5 may attend a similar workshop from 11 a.m. to noon. The cost is $2 per child. Reservations are required, as space is limited. Call 941-1065.

Also at Hidden Oaks Nature Center, any child age 6 to 12 can learn to print holiday cards and wrapping paper with nature motifs at a free workshop on Dec. 14. The printing workshop will be from 2:30 to 3:30 p.m. and reservations are required. Call 941-1065.

Parents of college-bound high school students in Northern Virginia are urged to attend a workshop called "Financial Aid Form Step By Step" Tuesday at T.C. Williams High School, Alexandria. Starting at 7:30 p.m., Marie Bennett, director of student services at Northern Virginia College, will explain the process of applying for financial aid and federal regulations concerning aid and loan programs. The workshop will be in the school's mini-auditorium, 3330 King St.

Single parents in Northern Virginia are invited to attend any of four December meetings of the Fairfax chapter of Parents Without Partners, an international social and support group, to consider membership. The schedule includes meetings on Sunday and Dec. 13, 16 and 30. Meeting times and places differ, so call 560-4897 for specifics.

The City of Fairfax reminds residents that real estate and personal property tax bill payments are due by Monday. Any city resident who owned personal property Jan. 1, 1987, who did not receive a tax bill must call the treasurer's office at 385-7901. Any city resident who is supposed to pay real estate taxes but did not receive a bill can contact the treasurer's office at 385-7904. For more information on personal property tax assessments or real estate tax assessments, call the commissioner of revenue at 385-7881 or 385-7840, respectively.

Beginning Monday, internationally known painter and teacher Albert Handell will conduct an intensive, five-day workshop on working with pastels at the Art League School, 104 North Union St. (The Torpedo Factory), Alexandria. The workshop is open to students of all levels of experience and will be from 9:30 a.m. to 4:30 p.m. Call Gerry Gordon at 683-2323 weekdays from 9:30 a.m. to 4 p.m.

Shuttle service will be available Saturday for visitors going to and from the Scottish Christmas Walk in Alexandria. DASH buses will begin to pick up passengers from the King Street Metro station at 9 a.m. and drop them off in the vicinity of the parade route. The shuttle service ends at 1 p.m. Return trips will leave from regular King Street stops. Bus fare will be 50 cents until 1 p.m. For more information, call 370-DASH.