In Noordwijk, the Hans Brinker is a hotel for children where parents could park their offspring and take a day off, a week, a school vacation, or for as long as three months.

Suppose there were hotels for children, where parents could park their offspring and take a day off, or a week in the country —or a round-the-world cruise —secure in the knowledge that the children would have expert care, careful supervision, and a wonderful time? Europe has had such hotels for…