Mejim is suitable for children aged 0-8 years old. According to the physical and psychological development of children, it is divided into 8 stages. The first stage is 6 weeks-6 months, the second stage is 7-13 months, the third stage is 14-22 months, the fourth stage is 23 months-2.5 years old, the fifth stage is 2.5-3.5 years old, and the sixth stage The stage is 3.5-4.5 years old, the seventh month is 4.5-6 years old, and the eighth stage is 6-8 years old. Please see their official website for a detailed introduction~