Answer:
I am a bow that can never be tied or broken but can disappear. What am I?
What can you hold in your right hand but not in your left hand?
I fill a room but take no space.
I go up and never come down no matter how hard you wish. As I get higher, more wrinkles crawl on to the face. What am I?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
No matter how little or how much you use me, you change me every month.