To gain an initial exposure to the concept of molecules.Materials Needed:(for Activity #1) paper cup, zip-lock baggie filled with water, two empty zip-lock bags, pencil, a solid object such as a rock or a ball; (for Activity #2) 3 balloons for each group: one filled with frozen water, one with water, one with air, one scissors for each group, one empty bowl, chart paper and markers for each group;