Answer:
I am asleep when you are awake I am awake when you fall asleep. I can fly but no feathers to aid my flight.
David's father has three sons: Snap Crackle and ?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
What is so fragile that saying its name breaks it?
What goes up and down, but does not move?
No matter how little or how much you use me, you change me every month.