This document provides instructions for making a miniature tornado in a bottle. The instructions include using two 2-liter soda bottles, filling one with water, taping the bottles together at the top, and quickly turning the bottles upside down and spinning them to create a vortex in the top bottle. It also explains how tornadoes form in nature due to opposing wind directions that cause warm air to spin vertically and form a funnel cloud when it reaches the ground.