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 get thrown in the air and will fall down. I get thrown down and I will rise in the air. What am I?
Lighter than what I am made of, more of me is hidden than is seen. What am I?
I plow and plow but never sow.
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead. What am I?
A cowboy rode into Friday. He stayed in town for three days and rode back on friday. How is that possible?