Singing learning in the true sense needs to start after the child's voice changes. Before that, there is children's vocal music. Babies can usually start formal learning of vocal music when they are 4 years old. During this period, the baby officially leaves and enters the preschool period. This is the golden period for the baby's intelligence and various talents to be enlightened.

Child's voice can be divided into infant voice stage, early child voice stage, mature child voice stage and late child voice stage. The infantile voice stage is generally between four and six years old. The voice is immature and the breath is weak. Vocal ability is poor and pitch control is not good enough. The early stage of children's voice is generally between the ages of six and eight. The development of the vocal organs is relatively stable. The voice gradually becomes clearer and brighter, with a certain texture, and the child's voice has a distinctive color.

The maturity period of a child's voice is about eight to eleven years old. The late stage of children's voice is from about eleven years old to the early stage of voice change. At this time, the toughness of children's vocal cords increases, and the voice timbre is still bright and crisp, but not as clean and pure as the middle stage, and occasionally has hoarse voice quality. Voice strength, pitch control, skills and performance ability were significantly enhanced. Since each child's growth and development rate and circumstances are different, there will be subtle differences.

Generally speaking, after several years of scientific and formal study, children's singing skills and musical accomplishment will be greatly improved, which can lay a solid foundation for vocal music learning in adulthood.