My sons love to watch How It's Made. Each episode shows the steps (be they handwork or robotic assembly lines) to make three different products.
It's a fascinating show.
And it's also one of the most relaxing things on TV. Happy background music, the soothing voice of the narrator, and lots of swirling moving parts.
I'm more than happy to doze off while the guys watch an episode or four. Everybody wins.