Answer:
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
I help you carry your books.
My seas have no water, my mountains have no rock, and my land has no grass. What am I?
I am a key that is playful. What am I?
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. 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.