Answer:
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
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 all the knowledge you have. But I am so small that I can fit into your hands. What am I?
The more it dries, the wetter it becomes. What is it?
The dirtier I get, the whiter I am. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic