This classroom module will help students understand the process of viscosity testing and the behaviors of fluids though experiments with household materials. The guide includes directions for two modules to be completed over two weeks of class time, including notes on the experiments and analysis of the experimental data for both weeks. Lesson background, lab safety, and reference information are also included, as well as reference data and evaluation questions for both the student and instructor. Students should have a basic background in materials science, including the concepts of viscosity and and rheological behavior.