This kind of uv bead necklace can test the effectiveness of sunscreen, or experiment with color when you learn about the power

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.

Original Colour is white.  After changed,you can see rainbowed colors.

Size: 40CM,  68pcs uv bead togehter with elasitc cord.

We are UV bead ornaments factory.  we send goods just by EMS fast Way, not send by very slow and easy to be lossed way.

UV Sun Beads Changes Color in Sunlight Kids