Included in your kit is an Infra-red LED that can be used for fun and games with any system that uses an remote control such as a TV.
First connect up the circuit as shown, using the small clear LED from your kit rather than a Red LED.
Download the software and install it to the “libraries” folder. Open the TVB.pde file and Upload to your Arduino
Push the button and use a camera phone to “look at” the LED to check to see if it's blinking.
Take this home and try pointing at your TV to see if it switches off. If it doesn't work at first try connecting a 10K resistor from Digital Pin 5 to GND, this will use the EUR codes instead of the US codes.