This document provides instructions for creating a miniature tornado in a bottle using two 2-liter bottles, water, glitter, and tape. The bottles are taped together tightly and then inverted and shaken to create a vortex that mimics a tornado, entertaining observers. Real tornados form when warm and cool air masses collide in thunderstorms, causing an updraft and downdraft that can spin at high speeds and collect debris, warranting shelter from the dangerous storms.