We had thought the mobile as a sleep - our baby is awake but rather it and would be clamoring to it. I have the impression that it is a kind of television for babies, the lights change very rapidly, every few seconds comes a new song or a new sound. To fall asleep in my opinion a little more peace and repetition would be helpful, so it is not reassuring. As I said, to me it is like a kind of MTV for babies before, preparing for the TV. We do not use so often.