Answer:
Iβm white; perfect for cutting & grinding. For most animals I am a useful tool.
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
I am pinched by grandmas
Drop me and the world will shatter. You can always find me where you empty your bladder.
I may be of the eye, in order I am pie. In my center there is a star, I keep medics where they are. What am I?
I flow from the Homerβs mouth when he sees doughnuts.