My daughter had the night at birth but blue has now 4 years and never tire. Even if she does not carry around everywhere he is above all his fellow night and nap is very soft and he sleeps with her against her heart. He plays several tunes that are linked together discrete aquatic sounds and soft light it turns itself off and push gently on her belly stimulus melody along with a long press allows the child of stop. It works with 4 batteries and lasts long enough compared to other more demanding pilots. The sound is adjustable on 2 levels and can be set off which is handy when you put it in a suitcase to save batteries. the inner casing can be removed allowing to pass the blanket machine. For me it's the best music night market and I have tried several buy without fear you will make a happy and you certainly will not be disappointed