Pretty cool. Don't forget the peppermint candy ornaments that you can make with cheap candies and your oven.
I've heard of a guy somewhere in Missouri or something that made his entire house's lights go with the beat of his own personal radio station. The timing of the lights takes an extraordinary amount of time to do, but it's totally worth it. Surely there's a quicker way to do it, like the lights going along with the waveform.