VIA NORTHERN VIRGINIA MAGAZINE: Dining with young charges can be exhausting—plotting amiable seating arrangements, scavenging for crayons/booster seats, etc.—without worrying if there’s actually anything healthy to eat. These restaurants make kid-friendly their business. Foxfire Grill 6550 Little River Turnpike, Alexandria; 703-914-9280; http://www.foxfire-grill.com Average entree: $13 to $20 ($$). Open for lunch, dinner and late-night dining […]