At 3 months old, your baby’s little arms and legs are a little stronger, and of course they are moving around more, and their attention to the outside world has improved significantly. The mother at this time to remember to do more interaction with the baby, the baby development benefits! 1. Exercise 1. Prone head lift: practice lifting the chest on the basis of being able to lift the head 90 degrees, don’t lie down too much or always hold it in your arms, which will reduce the time for your baby to move on his own; at this time, parents can use toys in different places to tease the baby to find and extend the time of prone head lift and chest lift. 2, roll over (supine side): baby learn to roll over supine position practice roll over to the side position, do several times a day, parents can use toys on both sides of the baby to tease or give appropriate help. 3, baby exercise: continue to do exercises every day according to the doctor’s requirements, practice the upper and lower limbs, head lifting and turning movements. Second, cognition 1, sight shift: two toys or two people to tease the baby, so that the baby’s eyes from one toy or person to another toy or person, and gradually learn to find the disappearing toys and people. 2, touch and grasp: baby from often clenched fist development to hand can open, from only eat to hand development to put both hands in front of the eyes to look carefully, at this time parents can consciously put different quality, different feeling things into the baby’s hands, let the baby passive grasp, or pull the baby’s hand let him (her) touch the bottle, mother’s breast and face. Language Laughing out loud: Babies have more mature sensory development, more pleasant emotions, not only can spontaneously laugh but also be amused, parents can use different tones to talk to their babies, such as kind and amiable voice, commanding voice, excited shouting, etc., so that babies can hear more people’s voices and enrich the language environment. And you can make vowel sounds to your baby so that he or she can imitate them. Life and interaction mother-child interaction: in order to make the baby become social people learn social interaction, from an early age should pay attention to parent-child communication, first of all between mother and father. To pay attention to the baby’s emotional changes, through the regulation of the baby often keep happy emotions and have a sense of security, in order to make the baby smile to more people and develop a sound personality.