We have this great contest at our library for staff that we have been running for the past 3 years. It all started out of a lunch discussion and somehow snowballed into this big deal. Now we can't NOT do the contest. It requires almost no prep work and our prizes are 1 $5 Tim Horton's gift card for each of our three locations. What is it??? It is the "When will it snow 1 inch?" contest.
My library is in southeast Michigan, where it gets cold and snows pretty often. What is funny, though, is that since we started this contest three years ago, it won't snow an inch until late January/early February. You could blame it on global warming, but we think that this contest has something to do with it.
We start collecting guesses in mid to late November (or whenever it starts to have freezing temperatures). This year we made snowflake die cuts. Everybody writes their name and their date on the shape and tapes it to the window (at our branches they are on cupboard doors).
Whenever it snows, our community relations person goes out to measure the snow with her ruler. As our library system covers 2 townships, we specify one location where it has to snow 1 inch. We measure the snow at the base of a statue in our front parking lot.
That's what we do for fun here in the winter. What do you do?