Light Meter
Build a light meter using an I2C level converter, LCD, and TSL2561.
OLED TRON Clock
Use an OLED display, an RTC, and an Arduino to build a TRON style clock.
Arduino "Hunt The Wumpus"
Use Adafruit's RGB LCD shield and an Arduino to revisit the early days of computer gaming. You too can hunt the Wumpus or, perhaps, be eaten by the Wumpus.