Answer:
Different milestones characterize each stage of infant (0 to 12 months) and toddler (12 to 36 months) development. Although most healthy infants and toddlers reach each milestone within a specific window of time, there is much variation as to how wide that window may be.
INFANCY
Infancy is defined as the first year of life and is the period of most rapid growth after birth. As a toddler, humans develop motor skills, such as the ability to walk, and communication skills. Adolescence is an important period in terms of physical, mental, emotional, and social changes.
TODDLER GOOD
The toddler stage is named for the term “toddling,” the way children move when they first learn to walk. It is also commonly referred to as the “terrible twos." However, most parents and experts actually consider the toddler stage to span roughly from ages one to three—a wide range in terms of child development.
