All Ages Central: Monday, July 1, 10:30 a.m. Dumfries: Wednesday, July 10, 10:30 a.m. Nokesville: Wednesday, July 17, 10:30 a.m. Potomac: Wednesday, July 24. 10:30 a.m. Haymarket Gainesville: Wednesday, July 31, 10:30 a.m. Prince William County Sheriff's Office will produce a plastic ID card with your child's photo and measurements. This card could be the key to assisting law enforcement agencies if a child ever goes missing. Producing the card offers children a fun and positive experience interacting with law enforcement officers. The Sheriff's Office does not retain the information to protect the family's privacy.