Answer:
I am the thing that is used to make your weight. What am I?
I make billions of dollars selling windows. Who am I?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
I am useless when together but useful when I am broken apart. What am I?
I am always hungry, I must always be fed. The finger I lick will soon turn red. What am I?
The answer I give is yes, but what I mean is no. What was the question?