The problem is it shouldn't be impressive, it use to be called being a good parent.
Well, I think you went above and beyond a little by actually melting down rock
Add in that now with the internet you can quickly find out about things you have limited or no knowledge about and it is a lot easier than when I was little.
Indeed. The challenge now seems to be teaching the kids to vet information since it is now trivial to access. I'm struggling a bit with how to do this, but I think surfing the internet with them seems to be effective.
Another thing that has helped with exposing them to different thing is having my son in Cub Scouts.
I think this depends heavily on your local chapter. I was extremely unimpressed as a child, and my kids have not gotten into Girl Scouts/Cub Scouts - though there is of course still time.