A new feature on our web site will be a “What’s going on here?” post. Each month we’ll post an interesting question or device, and ask our members to make comments. The first person with the right answer gets bragging rights (or the voice of our web weaver, Lee Trampleasure, on your home answering machine if you’re a fan of “Wait Wait, Don’t Tell Me”). July 2010: Poly Density Kit Educational Innovations sells a “Poly Density Kit” shown in the video below: First the bottle is shaken, and all the beads mix uniformly. After the shaking stops, the blue beads…