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.
I am an odd number. Take away a letter and I become even. What number am I?
I am heavy forward but backward I am not. What am I?
What has a bottom at the top?
I am an object which is used in baseball. During the day I can't be seen at all. What am I?
No matter how little or how much you use me, you change me every month.