Answer:
I know a word of letters three. Add two and fewer there will be. What is the word?
Poor people have it. Rich people need it. If you eat it you die. What is it?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
What flies without wings?
What goes through towns and over hills but never moves?
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.