Infancy is a time of rapid growth. Cognitive, physical, and social developmental changes are very evident. While there is variation in the rate of growth, most infants follow a similar pattern of development from month to month. Much of this growth is under the influence of genetic maturation, however, the child's environment is critical. Infants need quality nutrition, health care, interaction, tenderness and touch, and novelty in order to maximize their abilities and potential. Be good to your baby! Infant development is the foundation for their whole life.