The weather in Iceland is very changeable, it can be sunny and warm and just minutes later it can be snowing.
The children in Lundur (3-4 years old) noticed that it was snowing outside and everything was white and still. That same day it started to rain and all the snow was gone after lunch. It cought their attention so we wanted to research that further.
Of course there were snow again the next day so we went out and put snow in two jars