1.Movement development Prone head lift: The most important progress in these months is the increase of the baby’s neck strength. Pull sitting up: At 1 month old, if you gently pull his arm to make him sit up, his head will be tilted back weakly, if you practice several times a day, by 3 months, he will be able to hold his head up steadily. Hand and arm movements: hand movements develop from non-random to random. 2. Language music and foreign language stimulation (1) Talk to your baby in a warm language with a clear voice and short, slow, repeated words. (2) Play music to the baby often. (3) can also give the baby some foreign language inculcation. 3.Emotion and communication, cultivate parent-child relationship To often communicate with the baby face to face, from the eye to eye to cultivate the intimate feelings between parents and children. To carefully observe the baby’s needs, so that the baby’s needs are often met, so that the baby will often maintain a happy mood, smile often, not only to make the baby’s health, but also to develop the attachment between parents and children. Abnormal signals No reaction to very loud sounds, 2 to 3 months not looking at people’s faces, not looking at their hands. 1.3 months old does not smile when teased face to face. 2.3 months old can’t lift head more than 450 in prone position. 3.3 months old can not babble and vocalize. 4. 3 months old in supine position, head and eyes can’t follow the moving toy horizontally and turn 1800. If you find the above situation, you should step up the training and seek discussion with the pediatrician.