Answer:
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
You can only have it once you have given it.
What goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
Iron roof, glass walls, burns and burns and never falls.
Do you know what you can hold without ever touching it?
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?