Cool Science Page

Hello everybody! I made my white color LED bulb into a bi-color LED bulb. To see how I made it, click the link bellow. http://www.instructables.com/id/White-LED-Bulb-Into-a-Bi-color-LED-Bulb/

Hi everybody. Since last month I tried make a large salt crystal. But I couldn't. However I could make small salt crystals.