I don't know if my little guy needs white noise to sleep, but we've been using it since day one — in part to block out noise we make around the house after he's gone to bed. When we travel, though, it's a pain to tote around our bulky sound machine, so we pop the pint-sized SoundBub into the diaper bag. The touch of one button brings on soothing sounds, and it can also be used as a portable speaker (it's Bluetooth enabled)