As we head into the season of air-conditioning, sixth graders in collaboration with tech, science, and the TPA have designed signs for the parking lot and driveway, encouraging an open-your-window approach to staying cool this summer. Our sixth-graders dove deep into the art of persuasion, studying propaganda posters from 1900 to today to understand how design influences behavior. They discovered multiple compelling reasons to turn off engines: idling increases CO₂ emissions, wastes fuel and money, creates unnecessary noise for our school community, and puts unnecessary wear on vehicles not designed for prolonged idling. Monitoring air at schools has shown increased levels of formaldehyde, benzene, and other toxins during the pick-up hour. For children’s developing lungs, this increases the risk of respiratory problems and other long-term adverse health effects. Plus, it's a Wellesley town ordinance! With parents as their target audience, students crafted messages that balance environmental responsibility with practical health and economic benefits. Their colorful, thoughtful designs remind us how a simple turn of the key can make a big difference for our planet, our bodies, and our pocketbooks. Let’s take our cues from the sixth-graders and be an idle-free community!