Crochet Stair Risers on the web

Once Again...not my work. I was surfing the web and through my emails and ran across a post on one of my crochet groups sending me to this link.

http://ragingwool.blogspot.com/2010/03/life-in-old-house.html

Who would think to crochet stair risers?

I could be dangerous if I had free time.