In old days, it was believed that brain is an static organ and after some point in life, it does not change or grow. Nowadays, it is known that changes in environment, behaviours, habits and neural processes can lead to changes in neural connections and synapses. So, brain is changing throughout our life. In other words, different experiences can alter both the brain anatomy and its physiological functions. These changes happen over a wide scale from cellular changes as a result of learning, to large scales such as cortical remapping after injuries. Learning a new skill triggers the formation of new neuronal circuits or strengthen some of connections.
So, the good news is that our brain is not hard wired and it is changing all the time; it can be developed even in adulthood and older ages by exposing ourselves to new experiences and by learning new skills such as a new language, a new musical instrument, a new sport and etc. Even simple and small changes in daily routines can develop new circuits such as using non-dominating hand to brush teeth or move the computer mouse. I have been trying these and it is fun!