Caspar, Nichola, Bluebell (9), Columbus (7) and Willow (2) sailed around the world starting from the UK in August 2014 and joining the World ARC. They sailed the Atlantic, Pacific, Indian, and Atlantic again before heading back to the Pacific and heading North to San Francisco and exploring the North West American coast. Their blog has a lot of great blog posts and useful information and advice for living on board as a family.
Family Blog: Two years and 40,000 miles
Related to the following Cruising Resources: Circumnavigation, Circumnavigations, Cruisers' Websites, Cruising with Children