When you bring them inside, they turn to white. Regular light bulbs do not effect them because they lack UV light. If you put sunscreen on a bead, you can visibly see the "UV blocking" effects. Experiment with what materials block UV. Includes information and ideas about more experiments. Maybe your son or daughter will invent a new sunscreen! - Makes a great solar educational and "crafty" gift! About 100 beads in the package. Students and Teachers project tip! These solar beads can demonstrate the effectiveness of sunscreen or UV light blocking medicine bottles. Using an amber colored medicine bottle, place some of the energy beads inside the bottle and keep some exposed in direct sun. You can then show that the medicine bottle has UV blocking effects that protect th...  (less)