This project was just for fun / part of MelonKart shenanigans.
The red box is a generic SparkFun box (red) that has been fitted with a arcade-style push button. Inside is a 12V battery and a car horn.
The red button is extremely tempting – most people are pretty surprised by the intensity of the car horn.
- Arcade-style pushbutton found here: http://www.sparkfun.com/products/9336
- Car horn found here: http://www.sparkfun.com/products/10966