The Case of the Onion-Smelling Shower Curtain: What That Stench Really Is (and How to Kill It)
Many years ago, I was invited to a career day presentation at an elementary school for a friend's son's 5th-grade classroom. I really enjoyed the time I spent with the kids, and I think they enjoyed it as well. I designed a presentation about water treatment for people's homes, which included getting the kids involved in testing the school's water for hardness, iron, PH, and TDS. While we were testing the water and seeing the results, I explained, in simple terms, what each water test meant. I also had a mini water softener that I ran the school's water through to show them the difference between hard and soft water. When we were done testing the water, we all sat down and talked about the test results and what they meant to refresh their memory. I had a short handout quiz that they all participated in answering questions. I gave away a couple of answers by mistake, so we all had a good laugh about that. After the quiz, I asked the kids if they had any o...