What about the uniqueness of the human brain?
Our brain is the most important part of our body.
In the same way you need to exercise your body you also have to exercise your brain and its capacity. This is done by several activities that require the use of logic.
You have certainly heard of the term "Brainstorm" which has the meaning of using your brain capacities in order to get what you need because every information we absorb is stored in the brain.
So to have a "strong" brain you should read a lot, play games that requires logic such as chess, take quizzes and many similar activities. So read a lot and improve your brain!