My son is 4 and a half months old, and I started playing this for him when we got home from the hospital and he was fighting sleep. We’d dance to it and I’d sing for him, and he’d fall asleep by the fifth song, the title song, which is also “our song” for me and my husband. Lately my son has gotten to the point where he will calm down just hearing the beginning notes of “Don’t Know Why”, even if he was screaming and fussing and fighting sleep before. We will definitely keep consuming this. :)