Mailing a letter is so easy, even a child can do it. Not every child, mind you. Some children are just not good at things. Evaluate your own child before you purchase a stamp. Put some words on a piece of paper, and fold up that paper into an envelope. Seal it up good, especially if you wrote any secrets down. You’re going to need to put an address onto the envelope and a stamp. If you want more mail, put on there a fake address. That’s a fun way to get more mail!