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At month one, babies can express any dicomfort or unhappiness by crying.
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Babies show delight by smiling, perhaps in response to an adult who is making funny faces at them.
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Babies begin to show their dislikes very clearly.
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Babies first show their anger when they don't get their own way. Older babies show anger at objects as well as people.
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Babies first show affection for caregivers. Affection for other children comes later.
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Babies begin to show fear of strangers at about eight months of age.
