10 Brain Building Activities for Children to Improve Stamina and Concentration It is a popular misconception that what you achieve in life is completely dependent on your genetics. Most human beings don’t even use a larger part of their brains, which means that they never reach their full potential. Thus, literally every human being can get much better, out of the resources that he or she has been endowed with. Here are some brain building activities, which can help one, especially children, build stamina and concentration.