You can touch me but you probably wouldn’t want to. I can see you but you can’t see me. What am I?

Question

What am I?

I will help you with your writing,
Probably through me you will see,
But if you want to ship me,
You'll put me right inside of me.

I wear many different hats you know,
In construction plus I'm tracing,
I also do work for the board,
Lots of kids use me for a racing.

You can fold me, tear me,
Rip me without using all your might,
But be careful how you touch me,
I may give you my famous bite.