On the weekend I purchased I Arduino board. An Arduino is a board that can make a lot of different things from robots to clocks and alarms. The Arduino can bring programs into the real world. There is a whole programming language for the Arduino that I find quite difficult to learn. So far I have built and programmed a LED, 8 LEDS blinking in a line with a button to pause, a servo, a light sensor paired with a LED and a light sensor paired with a servo. The light sensor works similarly to a motion sensor. When your hand or a object moves over the light sensor the light is blocked sending a message to your computer.