Field trips during the school year and family vacations during the summer keep Washington, D.C., crawling with kids all year long. More than any other city, perhaps, Washington is crammed with historic buildings, arts and science museums, parks, and recreational sites to interest young and old alike. The fact that so many attractions are free is a boon to the family budget.

Look for Frommer's Washington, D.C., with Kids, which makes an excellent companion piece to this guide, providing in-depth coverage of sightseeing with children in Washington.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.