Answer:
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
What can travel around the world while staying in a corner?
I come with a train and go with a train and the train doesn't need me but can't go without me.
What gets sharper the more you use it?
When you take away the whole from me there is always some left.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic