Star Trek: Captain's Chair Easter Egg - Klingon Bridge

Go to the bridge of the Enterprise-D. Sit in the captain's chair. Look on the left or right-hand simplified control panel. There will be a number that you have to type into the extreme left-hand side of the tactical "horseshoe" that Worf stood. You will be taken to a less-than-interactive Klingon Bird-of-Prey bridge.
Also, on several panels on the ships (mostly the original Enterprise) you'll find a number of basic games like concentration or tic-tac-toe or even hangman and simon.