Answer:
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
To you, rude would I never be, though I flag my tongue for all to see. What am I?
I am good at concealing what's real and hide what's true. Sometimes I bring out the courage in you!
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
If you lose me, you may cause people around you to lose me too. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?