Participate is just what I've been waiting to do, until someone left a good point to jump in.
And because YOU asked for it, here's my first fill-in fun factoid...The largest thing to be sent through the mail was a building. In 1916, a young businessman by the name of William H. Coltharp decided to construct a new bank on the corner of a street in Vernal, Utah. Of course, Coltharp couldn’t send a completed building through the mail, wall by wall. But Coltharp wanted the best bricks in the area and decided to have those bricks sent from the Salt Lake Pressed Brick Company—all 80,000 of them. He reasoned that parcel post was the most inexpensive way to ship the bricks for construction, and he carefully packaged the bricks in separate crates weighing less than the 50-pound weight limit. Somewhere around 40 crates were shipped each time, and each shipment weighed roughly one ton collectively. It was Coltharp’s infamous scheme that prompted the U.S. Postal Service to change their rules so that a customer could only send 200 pounds of goods per day. Their reasoning? “It is not the intent of the U.S. Postal Service that buildings be shipped through the mail.” (From mentalfloss.com)
(Reminds me of the time back in the 70's when I tried to start a student riot in a correspondence school by mailing them a brick...)