During those early years of life, the child’s brain is like a digital recorder set on constant record. Or, measured with an electroencephalogram (EEG), the brain-wave frequency of a child from birth to age two is in the delta range, which is also the frequency of the brain waves in a sleeping adult. The brain-wave frequency for a child from two to six is in the theta range, which is what an adult experiences in a state of imagination or reverie or while dreaming.
