See, that's the sort of anecdote I'm talking about. Isn't it just as likely that you watched a lot of pop sci TV because you were already interested in science? Or that you just watched a lot of TV, and now recall the pop sci TV most fondly? Or that you didn't actually watch as much pop sci TV as you now recall, but it seems more significant with hindsight?
People of my generation generally seem to have the causal arrow pointing in the opposite direction when we recall science books and magazines. It's "I read a lot about science when I was a kid, because I found it interesting," rather than "I'm interested in science now because I read a lot about it when I was a kid."
There's surprisingly little research on this topic, but there's an interesting review of what there is
here (300KB pdf). It seems that's what required to sustain a child's natural interest in science is
a well-organized programme of science education, rather than exposure to random snippets of information.
Grant Hutchison