In this four-part activity, learners explore how the body works and the chemistry that happens inside living things. In the first activity about molecule receptors, learners use their sense of smell to identify common substances. Next, learners locate examples of the structures made from different kinds of proteins on their body and cook an egg to examine protein folding. Then, learners dissolve sugar in water to discover the best conditions for the stomach to dissolve food molecules the fastest. Finally, learners test foods for carbohydrates (starch) and lipids (fats). This guide is part of the "Passport to Chemistry Adventure" kit, but the kit is not required to properly facilitate this activity.