Answer:
White fat and fluffy, May even look like a puppy. Seems heavy but is light, Floats about without a worry, But if it turns dark you have to hurry!
What an fill a room but takes up no space?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
I climb higher when hot, But beware my rage, I’ll kill with a breath, If I can escape my cage
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
What covers its face with its hands, speaks no language, yet most known what it's saying?