Somewhere between the ages of 5 and 8, our brain waves change again to an Alpha wave pattern. In Alpha, the brain is in a light meditative state. When we close our eyes and eliminate all of the sensory information from the environment, alpha waves are produced in the brain. We tend to think less because there is little information being integrated from the external environment. We relax. It is at this point in child development that the analytical mind begins to form. The child is genetically changing and along with the sum total of the environmental cues he has experienced, both will influence the growing nervous system. As a result of this type of brain wave activity, children begin to interpret and draw conclusions about the laws of external life. This is just about when children figure out that there is no Santa Claus. As the analytical mind forms at this age, it acts as a barrier to separate the conscious mind from the subconscious mind.
https://drjoedispenza.net/blog/the-waves-of-the-future/