Sunny Beads (mixed colours)

Sunny beads change colour in sunlight because they are made from a special ´reversible photo chromic´ material. This material changes its chemical structure when exposed to ultraviolet light (like sunlight), allowing it to absorb a coloured pigment or dye. Once out of the sunlight, it becomes colourless again. * pack contains approx 100 pony beads * beads turn from white to light blue, dark blue, purple, pink, yellow and orange when exposed to sunlight * a great way to teach about UV light, particularly for girls * includes ideas for simple experiments * beads can be used to make necklaces, bracelets or hair braids * Not suitable for under 3s because of small parts