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?
You bind me and I walk. You loosen me and I stop. What am I?
I break down buildings, I crumble mountains but you can't see me. What am I?
When I live I cry if you don't kill me I'll die.
You heard me before and then again. Afterward I die until you call me again.
What language does a billboard speak?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic