Answer:
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find
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.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
In the land of the green glass door there are riddles but no answers, sheets but no blankets, and books but no words. Name something found in the land of the green glass door.
I'm a type of pizza that is folded in half before cooking to contain a filling
I have two eyes in the front and a lot of eyes on my tail