It is the song that it is sung though I let you stop lulling babies to sleep well from Yuri kago no uta old days, and crying.\rbrAn alpha wave is released by hearing the sound of the music box and is effective in decreasing a stressful hormone.\rbrIt relaxes a baby and feels comfortable and stops crying and can expect an effect to become sleepy.\rbrAs for the sound of the breathing of a sleeping person, the sound called the ğ seems to feel relieved for a baby very much equally.\rbrBecause you match a sound of the breathing of a sleeping person with the sound of the music box this time and made it, I think that there is the individual difference, but I lay you, and, please try it to reckoning and the child who you cry, and fret.