Answer:
Four fingers and a thumb, yet flesh and blood I have none. What am I?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?
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.
I am a ship that can be made to ride the greatest waves. I am not built by tool, but built by hearts and minds. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.