Here we are at a crisp -45C in Thompson, MB Canada on March 11, 2009 - the coldest day of the winter so far. Wind chill factor is at -50C.There are many things you can do for excitement in Thompson, MB when it's this cold and blowing bubbles is one of them. Now I was told that bubbles would freeze and make a "tinkling" sound at -40C and colder. Well they don't unfortunately. They shrink - collapse into themselves leaving a "skin" behind. The cold causes the air inside the bubble to be less dense which causes the collapse.Keep warm - and never let the cold deflate your spirit!!