每个孩子的童年都有无数的趣事、傻事,我的童年也不例外。记得,那是我4岁的时候,妈妈让我住在外婆家。我是个听话的孩子,有时我很喜欢坐在门外的小凳子上,呆呆地看着天空,看着,看着,脑子里出现了许多疑问:天怎么是蓝的?天会掉下来吗……有一天,我的脑海里又出现了新的问题:为什 Every child's childhood has countless anecdotes, silly things, my childhood is no exception. I remember, when I was 4 years old, my mother let me live in her grandmother. I am an obedient child, sometimes I like to sit on the stool outside the door, staring blankly at the sky, watching, watching, there are many questions in my mind: how the sky is blue? One day, another new question arose in my mind: why