This is the perfect addition to your post office unit.
What will you get?
* 11 posters that sequence what happens to a letter, from writing to delivery
* The posters can be bound into a book or used separately
* I used the official Postal Service website as a basis for the posters
This is a growing bundle so the price will go up. If you purchase it now, you will receive the additions at no extra cost. :) You will just have to download it again.