Brain science research shows that 0-3 years old is the period when the brain develops fastest and has the strongest plasticity. When a baby is born, its brain is about 350-400g, which is twice that after 9 months of birth, accounting for about 50% of the weight of an adult brain, and it reaches 75% of the weight of an adult brain at about 2 years old. It can be clearly seen that the first three years of a baby's life is a critical period of brain development, that is to say, it is easiest for a baby to learn some knowledge and experience before the age of 3, and many habits are established before the age of 3. Most of the courses in early education classes are set according to the characteristics of the baby's brain development, which can help the baby to seize the "window of opportunity" in time and develop the baby's intelligence to a certain extent.