Nantucket is a popular spot for family reunions. Every year generations gather on the beach for picnics or to have their holiday card taken by a professional photographer. It’s easy to understand why: The beaches appeal to all ages and the restaurants are mostly very kid-friendly. There are plenty of active options, too, including swimming, surfing, sailing, hiking, biking, and sports camps, and rainy day activities like the Whaling Museum and the Maria Mitchell Aquarium.