The Louvre Museum in Paris covers 40 acres and hosts more than three million works of art, making it a treasure trove of history that is a vital stop on any visit to Paris. It began as a fort and became two palaces that later combined to host the royal collection of a succession of French kings. Tackling a museum of this size with children requires careful planning and a willingness to skip over some of the museum for the sake of keeping the kids happy.