The first three years of life are critically important for brain development. A long term study detailed in ths important book showed that the greater the number of words children heard from their parents or caregivers before they were 3, the higher their IQ and the better they did in school. Children who have heard thousands of books have a richer understanding of the world and their place in it. Most importantly, they have a distinct advantage over peers who have not had the benefit of being read to regularly.
Meaningful Differences in the Everyday Experience of Young American Children