Make soap play dough with this recipe by Amanda Of Lovin' Soap. Here is what we made with a few variations. I added a large amount of corn starch to this because my dough was too sticky and used extra baking soda as well. We live in a humid climate so you may need to add more or less depending on how your hot process soap turned out and how it reacts with the dry ingredients. Basically, if its too squishy, add corn starch. If its too dry, add a tiny bit more liquid glycerin. Do not add water! Adding water could make it go bad without a preservative and this post is not going to go there!