Arduino is an open-source physical computing platform based on a simple I/O board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP,PD). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux) from http://www.arduino.cc The Arduino Mega 2560 Rev3 is a microcontroller board based on the ATmega2560 (datasheet). It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Mega is compatible with most shields (add-on electronic modules) designed for the Arduino Duemilanove or Diecimila. The Mega2560 comes packaged in a smaller sized retail box. Perfect for the family "super-geek". Arduino is extremely easy to program. Many programming resources are available for free on the internet. A compatible computer with USB connector is required. Computer cable & power adaptor are not included.