Recreate, in seconds, the swirling, twisting and spiraling action that can be found in nature-create a tornado in a bottle! Using this colorful plastic tube, teach about the science of vortex energy, kinetic energy and potential energy. Help students discover how air pressure and density work together to create an incredible force of nature. The Tornado Tube Connector recreates nature's phenomen by connecting two bottles with water. Assorted colors.