My son grew up with this mobile. Infant it allowed him to fall asleep with the sweet melody and pilot, play by putting both more lively music and rotating fluff ... And then to 9/12 months, he understood where were the buttons to put it alone, change the melodies, and configure it as he wished. This is convenient because you can indeed choose only light, only music, the two together etc. The volume at the lowest is very suitable for sleeping. It attaches easily to cribs. Only downside: it consumes a lot of energy when rotating lint (batteries not included)