Answer:
What bone has a sense of humor?
You heard me before and then again. Afterward I die, until you call me again. What am I?
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 go around in circles, but always straight ahead, never complain, no matter where I am led.
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright