儿子6个月时,妈妈退休来帮我带孩子。她发现我儿子不活泼,胆子小,尤其怕见陌生人。一问,原来我家住9楼,没电梯,平时我们很少带孩子到人群中去活动。妈妈说:“天天关门闭户的,孩子不跟孩子玩怎行呢?” 6 months old son, my mother retired to help me with children. She found my son was not active, courageous, especially afraid of strangers. I asked, originally I lived in the 9th floor, no elevator, usually we rarely take children to the crowd to activities. Mom said: “Every day closed doors, the children do not play with their children how?”