You can learn after the age of three, but it is not suitable for skeletal muscle development or brain development before the age of three.
It is best for girls to be four and a half years old and boys to be five and a half years old.
Under 5 years old, due to hand skeletal dysplasia, it is not advisable to practice the piano for more than 30min minutes at a time, on the grounds that practicing for too long will lead to hand skeletal dysplasia of children.
Under the age of 5 ~ 7, it is still mainly to play less and listen more. What you listen to is not necessarily children's songs, but can be western classic folk songs, chamber music in the classical period, and the volume of symphonies should not be too loud, which is not recommended by the avant-garde after the 20th century. It is conducive to shaping the keynote thinking and musical sense, and can also add interest by absorbing musical fairy tales and musical history stories.
About 5 years old, the development and adaptation of the central nervous system of men and women have basically met the conditions for learning piano.
Most pianists start to learn piano at the age of 5-6, Mozart at the age of 3 and Beethoven at the age of 4-5, so don't worry too much about early education, because learning piano involves a lot of solfeggio, music theory foundation and music aesthetics, so we must start with these aspects. You don't need to practice too much, but you need the soil of classical music.
Finally, children should not be forced to learn piano. Few people can be forced out, either the teachers are excellent or the parents know this very well.
The proportion of piano weariness in piano education in China is very high, which is counterproductive.
Of course, it is really important to find a good teacher. Most of the early piano education problems in online communication are based on teachers' incompetence or parents' failure to guide their interests (yes, interests basically come from families rather than teachers).