Just like cars, our bodies need fuel to run! The energy we take in as food, and that we use up through everyday activity and exercise, represents an equation that must balance if our bodies are to stay healthy. This activity explores how the different foods we eat contain different amounts of energy, as well as different nutrients that we need for our bodies to work at their best. Students will take part in a calorimetry experiment, releasing and measuring the chemical energy found in several types of food. They will also assemble their favourite meals and, after engaging with the Australian Guide to Healthy Eating, fine-tune these to reflect a more balanced diet.