Answer:
I am one small little piece of paper yet sometimes hold lots of value. I am all you need to get in to big events but will cost you. I am an important part of travel. And if lost you're not coming.
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
What can travel all around the world without leaving its corner?
I am easy to see, but no one likes looking at me. Without me, there would be no you. What am I?
We are little airy creatures all of different voice and features one of us in glass is set. One of us you'll find in jet. Another you may see in tin. And the fourth a box within. If the fifth you should pursue it can never fly from you.
When is it bad luck to see a black cat?