Answer:
I am all around you, but you cannot see me. I have no throat, but you can hear me. Valued during summer but despised in the winter. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I start in little but I end in full you'll find me in half and complete.
Better touch me before you proceed to second. 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?
It rows quickly with four oars but never comes out from under his own roof. What is it?