The Makey Makey is a device that functions like a keyboard and mouse input for your computer. The cool part is that you can use just about anything as the keyboard. By using the included alligator clips and jumper wires, you can connect anything that conducts a current to create creative inputs. (Fruit, clay, even other people.)
The keyboard functionality works out of the box with any existing game but the Makey Makey can also be programmed in Scratch 3.0 using custom blocks. You can also even program output pens to create Arduino like functionality!