Clean riddles for teens

I look flat, but I am deep, Hidden realms I shelter. Lives I take, but food I offer. At times I am beautiful. I can be calm, angry and turbulent. I have no heart, but offer pleasure as well as death. No man can own me, yet I encompass what all men must have.

What is the easiest way to double your money?

What can be swallowed, but can also swallow you?

How many apples can you put in an empty box?

I live in a house called a coop. I have two legs, two wings and a tail. I eat worms and bugs and grain. I lay eggs. I am a...

A man had a book that was worth $40,000. There were only 2 books in existence. He threw it in the furnace, reducing it to a pile of soot. Why did he do this?

I am always hungry and will die if not fed, whatever I touch will soon turn red.

They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?

I have a tail. I can fly. I'm covered in colorful feathers. I can whistle and I can talk. I am a...

Poor people have it. Rich people need it. If you eat it you die. What is it?