An easy geocache, probably a 1/1.5 but we couldn't possibly hide one that easy.
Have you geocached when it was very cold?
For Colorado Boy Scouts there is a Polar Bear Award. To earn the award the boy must sleep in an unheated area with the temperature below zero as measured on two thermometers.
Well, there is no such award in geocaching but there should be.
If you have ever geocached when the temperature was below zero, mention it in your log.