Hair lessons

The topic of my anatomy and physiology class today was hair.  Noah donated a lock of his to study.  I made a little fire pit for it and set it on fire so I teach about why burning hair stinks so much (there's sulfur in the keratin).

I threw in a quick lesson about false advertising and marketing too.  I had just taught that hair is made up of dead cells (otherwise haircuts would be a painful, bloody ordeal), and then noticed my bottle of conditioner claims to make my hair "more alive".