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.
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain; doing no harm, and feeling no pain. What am I?
I am a king who's good at measuring stuff.
If you have me you want to share me. If you share me you don't have me. What am I?
What runs but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps?
I am your mother's brother's only brother in law. Who am I?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic