In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays. Learners use "detectors" (UV beads) at five different stations, including sunscreen, water, sunglasses, shade and full sun, to explore what conditions block UV rays. Learners will observe that different materials block UV rays to different extents. After the activity, learners can use pipe-cleaners or strings to attach the "UV detectors" to a purse or shoelace and continue detecting UV wherever they go (optional). This activity can be conducted indoors by using an opened sunny window or a UV light bulb/blacklight to imitate the Sun.