After a kid suggests that Orange Balloon and Mouse write a letter complaining about a pollution problem, we're taken on a tour of the postal station. We begin by learning that in the early days, it took a lot longer to deliver mail because it all had to be carried by horse and wagon. Today, things are a lot different. When you drop a letter in the mailbox, it's picked up by a truck, which takes it to the postal station, a central processing facility that gets mail to where it needs to go. It's like a giant post office that operates at night, with lots of machines to get the mail to the right place. A machine actually sorts the mail, places all of the envelopes so that the stamps are facing the right way and applying a special light to the stamps to make sure that they haven't been previously used. After the date and time are pressed on so that the postage stamp can't be used again, a machine checks the postal code written on the envelope and sorts them by city. The machine can actually

• Tara Strong
• Don Dickinson
• Johnie Chase