Links to some of the cool projects others have done with the Raspberry Pi.
Have some fun with this capacitive touch project.
Use the Raspberry Pi GPIO and some Python programming to blink an LED.
Use the inexpensive LCD1602 display to show information from the Pi.
Demonstrate Pi's Pulse Width Modulation (PWM) capabilities with this project.
Create a project to sense motion of warm-bodied objects (people!).