A lullaby isn't just "background music," but a highly precise tool for tuning a child's brain and psyche. Essentially, it's the first "psychotherapy" and the first developmental program for an infant.  From birth, babies are highly sensitive to the melody and rhythm of speech and songs. Research shows that children distinguish intonation, tempo, and pitch even before they can understand words.  Other studies also show thatEarly development experts note that singing lullabies and rocking a baby stimulate several areas at once: auditory, motor, and spatial (the sense of movement in space). This helps build the brain's "framework," which will later underpin more complex skills such as speech, attention, and planning. In other words, a lullaby isn't just a way to lull a child to sleep; it also provides a daily, effortless way to train hearing, memory, and attention to language. 

Research shows that: infants calm significantly more when sung to rather than simply spoken to; adult singing helps delay or reduce crying and fussiness; and children relax more deeply when sung to lullabies, even if the melody is unfamiliar.

Other studies also show that: maternal singing can modulate cortisol (stress hormone) levels in infants: after 10-20 minutes of singing, the child's stress levels even out; in premature and vulnerable infants, singing and soft music help stabilize heart rate and breathing, improve sleep, and even reduce pain during procedures.
Psychologically, this means the child repeatedly experiences: "I'm scared/uneasy → a voice, rhythm, familiar melody comes → I feel better."
This creates an internal calming script. In the future, the child finds it easier to: switch from excitement to calm, tolerate frustration, maintain attention, and not become confused at the first stressful moment. A lullaby is a micro-lesson in language and speech structure (intellectual development), a bridge between the emotions of a child and an adult (attachment, empathy), and a daily, gentle workout for the stress system (psychological resilience).
And all this happens without gadgets, without special toys, simply through the live voice and attention of an adult. A narrow range, a gentle rhythm, and flowing phrases—all of this is ideal for an immature nervous system. It doesn't overload, but rather helps to "collect" sensations into a holistic, calm state. 

Our team has participated in numerous studies on the impact of lullabies on children and their mothers. Over 40 lullabies written by our authors have been used in research projects. Our children's content is distinguished by its approach: our lullaby team includes not only a composer and poet, but also a psychologist and neuropsychologist, who consider the sound of the lyrics and melodies and evaluate their positive developmental impact on children.