I must confess: In my younger days, I was a closet geologist. One summer on break from middle school, I became infatuated–no, make that obsessed–with all kinds of rocks and minerals. After a stint as a nature camp counselor, I could proudly rattle off the difference between sedimentary, igneous and metamorphic. I knew my quartz from my graphite, and eventually became a collector of many treasured finds. And no, it wasn’t because I was hoping to score a big, fat diamond someday. Now, I get to impart my learned wisdom (or whatever is left of it) to my daughters. Since studying rocks is hardly considered “sexy,” I love when I can stumble upon a educational product that can get my own juices flowing and, in [&hellip