Answer:
What can be seen but not touched?
Who plays when he works and works when he plays?
You can do this with your friends. You can do this with your nose. But don't do it with your friend's nose!
If you are unsure how to use one then just ask a flight attendant.
Made of ten but two we make, When assembled others quake, Five apart and we are weak, Five together havoc wreak. What are we?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?