Answer:
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
you hold my tail while I fish for you
You used to come to me for all sorts of information and knowledge before the internet was born
I am a mother from a family of eight. I spin around all day despite my weight. Had a ninth sibling before founding out it was fake. What am I?
I build up castles. I tear down mountains. I make some men blind, but I help others to see. 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?