40-day-old baby's smart performance

40 days baby is relatively small, intelligence is not fully mature. 40 days baby likes crying, such as hungry or bedwetting, or uncomfortable situation will be expressed through crying, if not crying, it is abnormal performance. In addition, the baby likes to observe the surrounding things, you can shake your head through the eyes to observe the surrounding things. If he is interested, he will stare, so parents should use a variety of colored items to attract the baby and cultivate the baby's observation ability.