Christmas time means different things to different people, but to me it means amazing homemade light shows. Like this Angry Birds home lighting display, which not only looks amazing, but is playable from your car in the street!
From the description on YouTube:
Help! The pigs are trying to ruin Christmas. Grab the sling shot and fire those birds! From the people who brought you the Guitar Hero Christmas Light game! Running on two computers and 10 Light-o-rama 16 channel controllers, uses more than 20,000 lights and less than one cent of electricity per game. Audio is broadcast on 99.1FM, and the controller has a long enough cord for people to play in their cars on the street. Easier than the iPhone version, and bigger too.
Amazing. Truly amazing.