Answer:
You write on me and secrets I can keep in places never seen. I spin like a top. Though stiff as a board, I'm often described like a mop. What am I?
I have a frame but no picture. I have poles but not standing up
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
Weight in my belly trees on my back nails in my ribs feet I do lack.
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
What is always coming but never arrives?