This document provides instructions for making a miniature tornado in a bottle using water, glitter, and two plastic bottles. The method involves filling one bottle 2/3 with water and glitter, capping it with an empty bottle, and taping the bottle tops together. When the bottles are spun upside down, the water and glitter will swirl together inside, simulating the formation of a tornado. The discussion section then provides background on how tornadoes form in thunderstorms in the real world due to opposing wind currents that cause warm air to spin vertically and pick up speed.