Create a set of Christmas lights that is connected to the entire world with Cheerlights.
This ingenious project involves you manipulating your Christmas lights to link them up to the Cheerlights system and your Wi-Fi. The upshot of this is that every time someone sends a tweet to @Cheerlights followed by a colour your connected lights will change to that colour.
Even though the manipulation of the lights involves a fair bit of technological know-how and components, the result is that you can be part of an incredible worldwide social project. Plus you’ll have awesome, rapidly changing Christmas lights, which is always fun, right?