Claim: The Makey Makey board was designed around the 32U4 microcontroller, which can be easily used as a USB-HID device and act as a microphone or mouse.
Evidence: The Makey Makey board was originally designed around the Atmel 32U4 microcontroller. This microcontroller can easily be used as a USB-HID device and act as a keyboard, gamepad or mouse.