Answer:
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
Cloud is my mother, wind is my father. What am I?
You can catch me but cannot throw me. What am I?
I no longer have eyes, but once I did see. Once I had thoughts, but now Iβm white and empty. What am I?
I have a lot to say but can't be heard because I can't speak one single word. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?