Answer:
What can you catch but not throw?
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.
Use me to reward good behavior.
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?