You really can't go wrong with a visit to Bar Harbor, ME. Home to Acadia National Park, there are lots of trails to climb and sights to see, many of which are kid-friendly. Camping is also a possibility if your family is up for it. The Lulu Lobster Boat is a can't-miss activity that teaches the art of lobstering to those who board it, and there's a hands-on aquarium for rainy-day fun.