Did you know that one teaspoon of healthy soil contains more living organisms than there are humans on the planet? Functioning, healthy soil is fundamental to quality, sustainable food and fibre production across the globe. We will learn about soil organisms, along with the interactions between biological, physical and chemical processes that build healthy soils. Students will take part in an imaginative role-play activity to learn about the processes of photosynthesis, nutrient cycling and decomposition. This activity is a great precursor or motivation for a school gardening project with a focus on building organic matter with compost or worm farms.