Wet t-shirt contest: Dip a t-shirt in water and hang it outside. Now watch it freeze.
It’s hammer time: A banana freezes solid and you can use it to hammer a nail straight through a board.
Ice vapour: Definitely the most Instagram-worthy: toss water in the air and capture the frozen spray as it blows away.
Tiny bubbles: Watch frost creep across the surface of a bubble, giving it a fogged-glass finish.
Are the lights out?
Too cold to go outside and check for the aurora? Follow @auroramax and @astronomynorth on Twitter to get up-to-date forecasts on the light show.