How do you explain rural postage to a small child?

Today not much got done except gathering eggs and cooking dinner. Oh and writing to a Gramma! Now this Gramma is out of our state and a certain someone likes to mail her copy work every once in a while. This requires a large manila envelope instead of a standard #10 envelope. The postage is always iffy on these so instead of making a trip to the post office that is 22 miles away we can put the package in the mailbox and the carrier will pick it up weigh it and leave us a note on how much is due. For some reason I cannot make it any easier to understand. The 7 year old has learned that you put a stamp on things before they go into the mailbox (my fault entirely). Now she cannot wrap her brain around it being okay to put something in there without said stamp.
Here is the youngest watching the rooster from her own "roost"! Adapt and overcome!

Currently they are making a story with stickers. But the questions repeat about whether the lady in the red truck will take the letter to Gramma. "Are you sure?" she repeats every few minutes. Our normal carrier drives a red jeep and her relief carrier drives a white mini van. When she writes her letter to Gramma it is basically tracing the words that I print for her on a paper and tape to a window covered with the "letter" paper that the Gramma receives. This may seem like cheating to some but for her it helps her form the letters that are very hard for her to do.

 You can see if you look at how she grasps a marker, her fingers want to bend all the way back instead of stopping like most. In this picture her thumb is the best example. Which reminds me we need to work on "tone" exercises. There goes the postal question again.. and now the stickers are landing on my arm. I wonder if tattoos are this easy?

                                    Tattoos made easy!

                                    Chicken! Naked of course

                                    Chicken! Not naked!
Time to wrap this post up and save it for after Bath time. Once that is done it is laundry, make up some taco seasoning and filling out some paperwork for the future employer. Yup! Gotta make sure the bases are covered :)