These are excellent beads for jewelry crafts, kandi craft making, and even solar science study needs! * Children love to sort and count before DIY kandi raver bracelets ! * Beads change color when detecting ultaviolet in the sun, and change back to plain jade without sun. The stronger the colors turn, the more UV they are exposed outdoor. See the mild color change picture when placed by the window. * A good beads craft help remind children to put on sunscreen when outside. * Good to use to test the effectiveness of sunscreen.
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