Answer:
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
I am black white and read all over.
I hold two meanings. With one I may be broken with the other I hold on.
Whoever made me doesn't want me. Whoever bought me doesn't need me. Whoever uses me doesn't know me. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?