The investment paid off not only because of the happier kids and parents. A friendly, healthy building also turned out to be an asset when searching for employees. As plenty of kindergartens were built in a short time, it became hard to find qualified staff. A healthy, friendly work environment is a good reason to choose one kindergarten over another.
Mundane tasks, like putting children on the potty or changing babies' diapers, are better here: big openings in the sanitary facilities allow for natural ventilation, and daylight turns what normally is a utility area into a dwelling area.