For good mental growth, the child's greatest need is the love and attention of adults. And from the moment of birth, a baby begins learning about the world. From birth, one of the greatest needs of all children is to be talked to, touched, cuddled, hugged, to see familiar faces and expressions and to hear familiar voices, and to see that others will respond to them. Children also need new and interesting things to look at, listen to, watch, hold, and play with. This is the beginning of learning.
Human voices are the most important thing for the baby to hear.
Human faces are the most important thing for the baby to see. Babies should not be left on their own for long periods of time. If a child has plenty of love and attention, and babyish play, as well as good nutrition and health care, then the child's mind will also grow well. Play is important to a child's development. By playing, a child exercises mind and body, and absorbs basic lessons about the world.