I was teaching my Bible class about being a servant. We studied John 13 where Jesus washes the disciples feet. I took a pan and put water in it and even washed the children's feet as part of our lesson. They got a real kick out of that. We finished the lesson by making some soap.
I searched on line for ways to make soap that did not involve anything hot. I found a site that said how easy it was - using Ivory Flakes. Well, I searched and searched, but Ivory Flakes are no longer sold - at least not in Wisconsin. So, I found another site that said to buy Ivory soap bars and shred them up. This I could do!
Then, we added just a bit of water and mixed and "squished" the shreds around, we added some food coloring and pressed it into a mold, which was a small disposable Rubbermaid container. Through trial and error, I found that it took a few days to fully set up, and even then, small pieces break off and stick to the sides of the sink when you're using your new soap. Not ideal by any means, but the kids enjoyed it, and even though it was a messy project, they all had really clean hands when we were done!