Answer:
Weight in my belly trees on my back nails in my ribs feet I do lack.
What word becomes shorter when you add two letters to it?
I'm not a bird but I can fly through the sky. I'm not a river but I'm full of water.
I cannot be burned in fire or drowned in water. What am I?
I am one small little piece of paper yet sometimes hold lots of value. I am all you need to get in to big events but will cost you. I am an important part of travel. And if lost you're not coming.
It weighs next to nothing but no one can hold it for long. What is it?