Answer:
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
I am a bow that can never be tied or broken but can disappear. What am I?
I go inside boots and outside shoes. What am I?
I have a strong affection for belly buttons.
I come with a train and go with a train and the train doesn't need me but can't go without me.
What never gets any wetter no matter how hard it rains?