Answer:
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
What is the word that even in plain sight remains hidden?
I am carried by mad animals.
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
A little house full of meat, no door to go in and eat.