How do things work?

I have been watching cable television, but have never watched a show that tells me how certain things are made or work. for example: how do they make dog food? i would love to see the inside of a dog food factory and how dog food is made. i am sure my bordie collie would also be interested. after all, its his food, not mine. also, how frozen tv dinners and pizzas are made. and, last but not least, how maunfacturers make and test condoms. these are just a few of my worldly unknowns. am i missing something on cable and what products being made interests you?