Answer:
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I grow up while growing down
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
I have an eye but am blind, a sea, but no water; a bee, but no honey; tea but no coffee; and a why, but no answer. What am I?
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
No matter how little or how much you use me, you change me every month.