"Healthy soils make healthy cities. Let’s start with what’s under our feet."This contest invites young people to explore the hidden world beneath their feet. Urban soils may seem invisible, but they cool our streets, soak up rainwater, grow food, and sustain life: even in the tiniest cracks. Through fun, hands-on experiments, kids will become “urban soil detectives,” observing, testing and documenting their discoveries to uncover how soil shapes life in their neighborhoods.