Going through the polka-dot

You remember the Polka-Dot-Door, right? The show that had the Polkaroo, the stealthy green creature that nobody ever saw, and the door that revealed the inner workings of different industries and worlds. I used to love being able to find out how things worked with a trip into one of the door's polka dots.

I don't remember the Polka-Dot-Door ever revealing how Lego bricks are produced, so you can now satisfy that long-lasting curiosity. Check out "The Making of a Brick."