🎤 Elementary Sound Expo

Teams present their tuned instrument or interactive wave demonstration to visiting elementary students using their finished prototype, exhibition poster, and calculation evidence. Each team must include a live demonstration, point to at least one wave equation or frequency calculation on the poster, and explain how design choices affected pitch, wavelength, or wave behavior in age-appropriate language. Audience members interact with the product and complete short feedback cards that note one thing they learned and one question they still have.