Convenient kit for lessons on how light is used in technology products, with a focus on "smart" colors (thermochromism and halochromism). Includes guided experiments titled, "Designing a Smart Thermometer" and "Designing a Freshness Indicator." Set includes materials for up to 40 students working in groups of four. Also included is a host of digital content, including teacher and student guides, in-depth background information, PowerPoint presentations, videos, worksheets and more.