The development standards of a 2-year-old and 3-month-old baby usually include physical development, athletic ability and intellectual development. The baby's growth and development can not only be evaluated from the physical aspects such as height, weight and head circumference, but also needs comprehensive evaluation in all aspects.

1, physical development: the baby's weight should be 12- 14kg, the height should be 85-90cm, the head circumference should be about 48cm, and the baby's skin should be smooth and ruddy;

2, sports ability: the baby can usually run and jump freely, or jump on one leg, walking is relatively stable, at this time, landing on one leg and jumping are relatively stable;

3, intellectual development: the baby can usually say complete sentences, such as what I want to eat, what I want to do, will accurately express emotions, easier to understand what adults say, and can communicate with adults normally. 2 years and 3 months is usually the peak of language development. Babies can accurately express their personal wishes, show disgust at dissatisfied behaviors, and show willingness and happiness to things they like. Babies have their own ideas and will, such as playing games by themselves.

Babies aged 2 years and 3 months can receive early education to promote their intellectual development and language development. In addition, we should pay attention to a reasonable diet in our daily life. It is recommended to drink milk once in the morning and once in the evening.