Fans of Doctor Who know that the sonic screwdriver is the ultimate tool. It can unlock doors, turn on lights, detect life forms, solder wires, and sabotage weapons. Presumably, the sonic screwdriver creates sonic vibrations to achieve whatever the doctor wants by vibrating th ...more
Kipkay shows you how to make a powerful flashlight for under ten dollars. To finish the flashlight off you can paint it with black satin paint.