You can take your kids to CarPool in Fair Lakes to play pinball, skeeball, and probably pool too. Since it's a bar you have to keep an eye on them but we have 5 games in the back room (Attack from Mars, Demo Man, Tron, Monster Bash, Dialed In) and just put the new Iron Maiden in the main room next to Game of Thrones and Ghostbusters.
http://www.fspazone.org/carpool-fairfax/