The Theta brainwave state When we’re kids — seven years old and under — we’re predominantly in a brainwave state known as the Theta state . In the Theta brainwave state, we are very absorbent to the environment around us. Receptive to suggestion. Highly impressionable. This is because in the Theta brainwave state we’re processing the data of our experiences with the limbic brain (the emotional brain), using the language of the subconscious  — imagery, sensation, symbol