The Makey Makey is a board with an Atmega32u4 which behaves like a HID (Human Interface Device) device, such as a keyboard or mouse. The board has solderless head pins and pads to connect alligator clips to which allows you to connect almost anything up to create a circuit and trigger things on your computer. Your imagination is the limit!
On the top side of the board are 6 pads (4 arrow keys and space bar + left click) which you can connect alligator clips to, solder to, or any other form of connection. There are another 12 inputs on the back, 6 for keyboard keys, and 6 for mouse motion, which you can access with jumpers via the female headers. The best part about Makey Makey is that it is an Arduino compatible board, which means that if you want to change the keyboard triggers from certain keys, or experiment with different program options, you can easily reprogram it using the Arduino IDE!
The Makey Makey is designed to work out of the box and requires no programming or electronics knowledge to get started.