Answer:
Without a bridle or a saddle across a thing I ride a-straddle. And those I ride by help of me though almost blind are made to see.
What can travel around the world while staying in a corner?
What is the beginning of eternity the end of time and space the beginning of every end and the end of every race?
I must be broken before you can use me. What am I?
A spirited jig I dance bright, banishing all but darkest night. Air can't kill me but water can. Share me, I won't get less unless wind ruins me. What am I?
It rows quickly with four oars but never comes out from under his own roof. What is it?