This kind of uv bead bracelet can test the effectiveness of sunscreen, or experiment with color while you learn about the power of sunlight. Included is a science activity guide with lots of fun experiments with solar radiation and light.
The solar pony beads are pale in visible light, such as indoors or if they are shielded by a UV screen such as automobile glass or sunglasses. The Ultra-violet sensitive beads contain a pigment which changes color when exposed to UV light from the Sun or other UV source
The bracelet mix five colour. when it is indoor. the colour as same. when it is in sunshine. it is colourful. It is interesting and funny. it is good use for children, men, woman as oranment.
