The sounds of MOONIE humming toys are non-computer generated, real recordings of natural pink noise.

The heartbeat sound is a recording of the hum inside a mom's belly. It allows the child to calm down and feel safe, with already well-known sound.

The sea waves you hear are of the Baltic Sea and the sound of the mountain stream are recordings of the stream in Tatra Mountains.

MOONIE also plays a lullaby that puts toddlers to sleep with the pleasant sounds of the kalimba. In addition, it offers two pieces of classical music composed by Claude Debussy: “Clair de Lune” and “Rêverie.”