This popularizing article introduces the basics of biocommunications to kindergarten teachers. It draws attention to the fact that communication takes place non-verbally, without words.
And that this type of communication is often primary for preschool children. She is engaged in humming and making other (non-verbal) sounds.
Smells and smells and how children perceive them. Touch communication, draws attention to the signals transmitted by the touches to different parts of the body (encouragement or calming, etc.).
It presumes the existence of soothing signals for preschool children.