There was an article on the radio yesterday about some artist making a sculpture out of a newly created substance that was blacker than anything else.
I got to thinking that most children nowadays won't have ever knowingly seen coal. At least not up close. Just the black stones in the garden where the coal bunker used to be and a pile of it on the Thomas day at the railway. They will know about charcoal though, but as a BBQ fuel that perversely is only used in summer on hot days. Coal fires that some of us will recall really only had a couple hundred years as a primary heat source.
So I will make a point at our exhibition this weekend of asking children what they think the black stones are and why I'm feeding them to my loco.