Brain Teasers

Just a few questions I wanted to ask you:

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.
What am I?

What number, when spelled out, has no repeated letters and has each of the vowels (not including Y) once?

Answers in the next blog! 3-2-1 Blast off!