Answer:
What is always in front of you but can't be seen?
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead. What am I?
I lose my head in the morning and regain it back at night. What am I?
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
If lightning strikes an orchestra, who is most likely to get hit?
No matter how little or how much you use me, you change me every month.