Connecting science with different cultures is one way to interest students in science, to relate science to their lives, and at the same time to broaden their horizons in a variety of ways. In the lesson described here, students make kimchi, a delicious and popular Korean dish that can be used to explore many important chemistry concepts, including fermentation, chemical reactions, and acidity and alkalinity. During this activity, students use scientific techniques and methods to explore the nature of kimchi, they learn to measure the pH of a food using a variety of techniques, and they come to understand the ways that food can be preserved.