Have you ever looked closely on a water droplet? The water molecules at the surface of the droplet like to stick to each other more then they like to stick to air. This forms surface tension: the surface of the water acts like a skin around the droplet. We had fun exploring surface tension at our Girl Scouts meeting today. We started by placing water droplets on top of a penny with a small pippet. The water surface tension helps in maintaining a large drop of water on top of