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At birth newborns have the ability to hear, smell, see, and respond to the environment. Infants typically weigh 7.3 pounds at birth and are between 18 and 22 inches long.
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At three months old an infant will already have the grasping and rooting reflex, along with sight and smell. But they will begin to lift their head
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At four months old, along its all of their other abilities, babies will begin to smile
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Between the age of five and 6 months old, babies will begin to grasp objects
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During the time span of eight and ten months, babies will start to crawl around, and maybe the infant will be able to pull themselves into a standing position
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At this time after being able to pull themselves up, and maintain some sort of balance babies will start to walk, tentatively at first.
