My oldest just turned 5, so he’s barely starting to watch stuff like Mytbbusters and nature shows. He doesn’t really “watch” tv so much as he has it on while he plays with something else, anyway. I grew up watching all the science shows, but now I don’t have much patience with them since the internet is so much better and faster.
I always have to be doing something else if I’m watching tv - sewing or reading or feeding a baby. Just watching, I don’t do. My kids love “Mythbusters.”