Letter in an Envelope
Fold the letter and put it inside the envelope.
This letter was written on April 11, 2014.
Mailbox
After your letter is ready, you put it in a mailbox.
A postal worker will pick-up your letter and take it to the post office.
Receive Mail
Letters and bills are inside of this mailbox.
The red flag is up because there is mail in the mailbox.
It is fun to receive mail.