Answer:
I can be swallowed, but I can also swallow you. What am I?
If you have me, you want to share me. Once you share me, you won't have me. What am I?
What do people spend a lot of money on every year, but never want to use?
I direct you from outer space.
Send poorly behaved children to me and let them sit here.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.