Every time you give a parent a sense of success or of empowerment, you're offering it to the baby indirectly. Because every time a parent looks at that baby and says 'Oh, you're so wonderful,' that baby just bursts with feeling good about themselves.
Reading to children at night, responding to their smiles with a smile, returning their vocalizations with one of your own, touching them, holding them - all of these further a child's brain development and future potential, even in the earliest months.
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