When I was growing up, we had discovery channel. That sparked my intrinsic curiousity. My daughter has that intrinsic motivation as well, but only for k-pop now. She likes youtube videos and she likes when I tell her about science stuff. Maybe I can combine that by recommending her some good youtube channels.
I still must warn that the guy messes with things that are definitely age-inappropriate for kids, though, see the aforementioned sulfuric acid.