The structures remain the same. You will always have 4 brain lobes (frontal, parietal, temporal and occipital), a cerebellum (involved in coordination of movement and balance) and many gyri (bumps of the brain) and sulci (grooves of the brain).
However, everything you do in your life can have an impact at a cellular level (brain cells/ neurons). After you are born, your brain will get larger as it creates new brain cells. Your brain will keep growing until about 18 years of age. Every time you learn something, you create new connections between brain cells. You are also able to re-shape these brain connections through new experiences. This is called brain plasticity and continues throughout life!