GREENSBORO, NC — How many miles do USPS mail carriers and truck drivers cover in a year? 3.2 Billion! Over 212,000 vehicles are used to make deliveries!

But before the mail can be shipped – it’s gotta be organized and that’s where this week’s Kids Want To Know question comes into play.

“Hi, my name is Darrell and I want to know how the Post office sorts and delivers all that mail.”

We checked in with our friends at a Greensboro Post Office to show us how it all works behind the scenes.

Read more: From Your House To Grandma’s. How Mail Gets Sorted & Delivered.