Training today for the upcoming "Five 5enses WOW! Experience" at the Tech -- including floor programs, demos and design challenges like "Hands-on Digestion", "What's That Smell?", "Holy Halitosis!", and "It's Not Snot" (most are tie-ins to Grossology, obviously) I made a kaleidoscope and a batch of purple snot (polyvinyl alcohol, borax, water, and food coloring). Here's some of the group working on the "Snot Shot" design challenge...