A steady 528Hz tone for kids' quiet time and bedtime wind-down. One hour of a soft, continuous tone that gives busy little minds one calm sound to focus on. Play it very low in the background. (A relaxation aid, not a medical treatment.)
A steady 528Hz tone for kids' quiet time and bedtime wind-down. One hour of a soft, continuous tone that gives busy little minds one calm sound to focus on. Play it very low in the background. (A relaxation aid, not a medical treatment.)