Answer:
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I grow up while growing down
I am an object which is used in baseball during the day I can't be seen at all
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
I am an English word with three consecutive double letters. What am I?
Which popular cheese is made backwards?