- Explore the Science of Ultraviolet Energy<br />- Beads Change Color in Sunlight and change back to white indoors<br />- UV Sol Beads change to color in the sun or whenever exposed to Ultraviolet rays: the brighter the colors、 the more intense the UV<br />- Makes a unique gift for all ages and a great fundraiser<br />                                                                                                                                Dimensions: 2.36 in x 0.31 in x 0.31 in<br />Weight: 0.21 oz