Today, music has become an omnipresent factor in the everyday life of man, and through music man expresses his deepest feelings and moods. It is not only a result of certain emotions, it can affect man, or produce emotions. Musical experiences of children begin with passive music activity, that is, listening and through organized and free activities children develop music skills and knowledge. The songs most commonly used in preschool institutions are children's songs that sing about animals, the four seasons, or religious events. Man's relationship with animals has existed since ancient times and the relationship between children and animals is natural, because of mutual openness and honesty. Children can easily recognize and identify their friends in animals. Because of this, there are many fairytales, cartoons and songs for children in which the characters are animals. When we talk about children's songs, we distinguish songs for children from children's folk songs. Children's songs were created by adults, so that the children would sing or listen to them, while folk songs were mostly created by children or groups of children. In order to process songs with children properly and to enable the children to adopt musical abilities and knowledge, educators analyse the songs using musical expression elements such as melody, rhythm, harmony, meter, text, musical form, character, tempo, dynamics and connection between elements of music. Through songs about animals, life messages are transmitted to children. They talk about friendship, tolerance and commitment, and they encourage the overall development of the child. Children's songs are divided according to age, into the young, middle and older age groups and are differentiated depending on child's vocal range. Songs for pre-school children are appropriate for their age, abilities and capabilities. The development of musical and singing skills in pre-school should be done gradually, and the first encounter with singing should be simplified. For the younger age group we choose smaller-scale songs, with appropriate textual content such as Zeko, Zeko (Rabbit, Rabbit) and Medo (Bear). The middle age group includes children ages four to five. Since these are the ages the child's interest in exploration is increased, with the help of music the child explores, shows interest in musical instruments, enjoys singing, dancing and playing. Songs that are appropriate for this age are Pjevala je ptica kos (The Blackbird was singing), Kukavica (The Cuckoo), Jež (The Hedgehog) and Medo Brundo (Grumbling Bear). The older age group includes children ages five to seven. Songs intended for children of an older age group have a larger voice range, more complex and longer lyrics and they have to match the child's need for dance and movement. Some of the songs appropriate to the older age group are Zeko pleše (The Rabbit is dancing), Šumska pjesmica (Forest song), Vjeverica (Squirrel) and U šumici zeko spava (In the woods the bunny sleeps). Through organized and through free activities, children learn about the possibilities of musical speech and express themselves through sound, in a way that they form a positive attitude and the need for musical art.