Answer:
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
What can travel around the world while staying in a corner?
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
We are little airy creatures all of different voice and features one of us in glass is set. One of us you'll find in jet. Another you may see in tin. And the fourth a box within. If the fifth you should pursue it can never fly from you.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?