Answer:
I am a tool for fairies.
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
I am a piece of paper that takes most people 3 or 4 years to get. What am I?
I sit in a corner while travelling around the world.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?