Answer:
What can be cracked before it's used?
What can travel all around the world without leaving its corner?
What do people spend a lot of money on every year, but never want to use?
Send poorly behaved children to me and let them sit here. What am I?
Glittering points that downward thrust. Sparkling spears that never rust. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?