Water parks are a special type of amusement park, with their own delights: they cool everyone down on a hot summer day; they will wear out kids in a jiffy; and they are fun for family members of all ages, including the teenagers and adults.
Plan to make your way to a water park among your other family activities on a New Hampshire vacation. Bring sunscreen and go at it; this will be one of the most memorable of your adventures in the Granite State.