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Experiences shape connections

The connections your baby uses are the ones that grow strong

Brain architecture is shaped by the interaction between genes, experiences, and the timing of those experiences during development. Every day, repeated use strengthens the circuits a child uses most often — while circuits that go unused are less likely to stay strong. In practice, this means the everyday moments your family lives are literally shaping which connections take hold.

This is why the small, repeated moments of a normal day — feeding, changing a diaper, bath time, a walk outside, a few minutes of play — carry so much weight. They are not a break from brain-building; they are the experiences that build it, precisely because they repeat so often.

What mainly determines which brain connections grow strong in early childhood?

AcademicHarvard CDCCenter on the Developing Child, Harvard University — Brain Architecture and early experiencesCenter on the Developing Child, Harvard University — Brain Architecture and early experiences