40 pretend pieces of mail you can personalize. I put this together for my students as an activity to sort through company mail. I addressed each envelope to an employer at my work and used my school Address. You can also make up a fictitious work place and employees if you don't want to use your school. I left the city and state so it would hold the text box and font for you to personalize. I purchase a 15 space filing box from Amazon for 16 dollars (shown in the preview).
For my classroom, I printed each page onto cardstock, cut out each envelope and laminated for longer use.