Answer:
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
My teeth are sharp my back is straight to cut things up it is my fate.
What can travel around the world while staying in a corner?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
small land in water.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?