Parents are scolded, prodded and provoked into stimulating their babies even before they are born. Children can be overstimulated. Individuals have differing levels of stimulation tolerance. What may be pleasant for some babies will upset others. Parents already know about this phenomenon.
Educators are reluctant to admit it.
Remembering back to 1959 when I began first grade, there was a calming effect upon entering the classroom. The entire first six weeks only lasted half the day until noon. There was a snack and reading readiness. No one felt pressured. Above the clean blackboard was the alphabet with both capital and small letters.