Did you know that children’s eyes let in more light than adults’ eyes do?
This means it is especially important for a child’s sleep environment to be dark and for children to get good morning sunlight. Melatonin production that occurs naturally in a child’s brain, important for sleep, can be suppressed by light exposure.
Read this New York Times article by Perri Klass to find out more about how a dark environment can be important for a preschooler’s sleep cycle.