I started down this path because one of my scouts, H, was extremely interested in chemistry. H was a 3rd grader Bear Scout who was asking me very insightful questions about how chemicals come together. I had that in mind when I found a recipe for "Bubble Dough". Just making Bubble Dough wouldn't cut it as a STEM Den meeting, so I combined it with an intro to polar and non-polar molecules, as well as the Color Changing Milk from Steve Spangler.