What was the name of that PBS children's show, and who was the host?

I'm talking about the children's book illustrator who would draw a scene from the story with coal. He was featured on a PBS series that I watched often when I was little (early 1970s). I think his name was Robbins, but I can't remember. Thanks.

What was the name of that PBS children's show, and who was the host?
robbin's nest


mark robbins