Your blog is fun and so well done. I loved seeing your house as I'm living in a ranch too. Our kitchen and bath are close to the same layout. Typical of the era and I recall many posts both here and elsewhere asking for ideas on our layouts.
The blackboard idea has been located in both my kitchen and bath. In my last home I hated the black fridge and bought one large enough to cover the front, then framed it in a chrome framing kit. Used Scrabble board tile holders for the chalk and eraser. Kids and adults seem to enjoy leaving funny messages and drawing pics. I always hate erasing their creations, just leave them alone until someone becomes creative again and changes whatever was there.
You had quite an adventure getting into your home. It is wonderful, especially the enclosed back porch. And the surroundings too.
Applauds for posting pics...from someone who is still shy in doing so. I posted some comments on your blog.