Fun Riddles

Question: Using 3 periods (.) and 1 question mark (?) make this a logical and grammatically correct sentence:

"That that is is that that is not is not is that it it is"

Question: For now I must stay under the man who made me,
but when he dies I'll be as powerful as he.
They will watch and listen to what I say,
then some of their money to me they'll pay.

Who am I?

Question: Round like a apple, deep like a cup, but all the kings horses can't pull it up.

What is it?

Question: At the beginning of the first day of school there was a dead boy found inside of a classroom. They found 3 suspects: The janitor, the teacher and one of the boy's classmates. The janitor claims that he was just cleaning the room, the teacher said that she was computing her student's grades and the boy's classmate claims that he was listening to music.

Who committed the crime?

Question: You are in a car with some helium balloons and hit the gas. While you accelerate, which way does the balloon move?