12, 13 girls can practice yoga, but it should be noted that children of this age are in the stage of growth and development, and their bodies and bones are soft. If they don't practice properly, their bones may be affected and deformed. Therefore, before letting children practice yoga, it is best to consult a doctor and follow their advice. In addition, if children are not interested in yoga, parents should not be forced.

Generally speaking, according to the specific situation of children and the doctor's advice, choose the appropriate yoga movements and practice methods.