Answer:
Break it and it gets better, immediately set and harder to break again.
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
Which weighs more? A pound of iron or a pound of feathers?
What gets bigger the more you take away from it?
What has a head, a tail, is brown, and has no legs?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?