Make a “Postbox” out of the JTB box, or an empty shoebox, and have your child decorate it as s/he chooses. Create a letter box that has all the supplies needed to create letters, draw pictures, and send the letter or package, including papers of various colors and sizes, postcards or index cards, stamps and stickers, address labels (the ones that come free in the mail are perfect), pencils, crayons, etc.
Go to the post office together and talk about the process of sending a piece of mail. Let them see you look up someone’s address and write it on the envelope. Talk about your own address, and write that on the upper left of the envelope explaining if they want to write back to us, there is our address too. Purchase stamps and have your child help adhere it to the envelope. Talk about how every home has a mailbox and the mailboxes in public places also accept mail.
Encourage loved ones to write a return letter so your child understands that writing letters may result in letters coming to them as well.