1) Microcontrollers are fun to play with and anyone can learn to make cool projects with them. 2) Examples of cool microcontroller projects include the TV-B-Gone universal remote, MiniPOV3 kit, Solar BugBot, LED Cube, and The Brain Machine. 3) A microcontroller is a complete computer on a chip that can accept input, perform operations, and output results. It works by fetching and executing instructions in a loop until powered off.