Llewellyn picked up the sand and poured it into the water, he then began to mix it, all the while wondering if it was really sand. Afterall, the muggle in him thought, sand is silica, and that won't dissolve in water now will it? It would need to be a polar...He trailed off into his thoughts slowly mixing the sand, and staring around the room at the other students. I wonder how many of them think about these things... He thought.